Displays all enabled streams and their configured rates.
Example output:
instance #1:
        Name                Rate Config (current) [Hz] Message Size (if active) [B]
        HEARTBEAT                       1.00 (1.000)    21
        STATUSTEXT                     20.00 (6.320)
        COMMAND_LONG                  unlimited
        ALTITUDE                        1.00 (0.316)
        ATTITUDE                       25.00 (7.900)    40
        ATTITUDE_TARGET                10.00 (3.160)    49
        ESTIMATOR_STATUS                1.00 (0.316)    44
        EXTENDED_SYS_STATE              1.00 (0.316)    14
        GLOBAL_POSITION_INT            10.00 (3.160)    40
        GPS_RAW_INT                     1.00 (0.316)    62
        HOME_POSITION                   0.50 (0.158)
        RC_CHANNELS                     5.00 (1.580)
        SERVO_OUTPUT_RAW_0              1.00 (0.316)    49
        SYS_STATUS                      5.00 (1.580)    43
        SYSTEM_TIME                     1.00 (0.316)    24
        VFR_HUD                        25.00 (7.900)    32
        WIND_COV                        2.00 (0.632)

This implementation does not need more resources.
It's not super efficient in terms of runtime, but it's also not something
that is called often.

- add datarate
- add UDP remote port
- add partner IP

Plus correct return value.
Iridium links are below that.

    - sitl_gazebo in PX4/Firmware (1dd67e77): https://github.com/PX4/sitl_gazebo/commit/b5a92095bfb1b6a218a80f58ad9fe09c89ef4598
    - sitl_gazebo current upstream: https://github.com/PX4/sitl_gazebo/commit/3c7d18d0a52657106a3a7190c54006ed6b442071
    - Changes: https://github.com/PX4/sitl_gazebo/compare/b5a92095bfb1b6a218a80f58ad9fe09c89ef4598...3c7d18d0a52657106a3a7190c54006ed6b442071

    3c7d18d 2018-06-19 TSC21 - travis: add -DBUILD_ROS_INTERFACE=ON option to catkin build
e89cf8f 2018-06-17 TSC21 - travis: use catkin build tools
f7a1c4b 2018-06-19 Elia Tarasov - remove unnecessary mavros libs and duplicate CMake message
c495c57 2018-06-19 Elia Tarasov - remove unnecessary dependecies
5c861a5 2018-06-19 Elia Tarasov - remove executable node
7d69268 2018-06-19 Elia Tarasov - remove redundant includes
6ba0eeb 2018-06-19 Elia Tarasov - remove redundant ros packages
9c69a95 2018-06-18 Elia Tarasov - modify target node name and add needed libs
147cb56 2018-06-17 elia - move class member function definitions to implementation file
dc24fcc 2018-06-17 elia - add undefined class varibales

    - v2.0 in PX4/Firmware (5e76f2dca7530404173601b4a231778381d4f3cc): https://github.com/mavlink/c_library_v2/commit/033fa8e7a4a75a0c3f17cea57e3be8966e05f770
    - v2.0 current upstream: https://github.com/mavlink/c_library_v2/commit/f5c0ba684659fbc6c6c5f8777bd30e0b3c32fdef
    - Changes: https://github.com/mavlink/c_library_v2/compare/033fa8e7a4a75a0c3f17cea57e3be8966e05f770...f5c0ba684659fbc6c6c5f8777bd30e0b3c32fdef

    f5c0ba6 2018-06-19 PX4BuildBot - autogenerated headers for rev https://github.com/mavlink/mavlink/tree/40f8149d642892b87c61acf3fb63d2512d06a22a

 LandDetector FW: Fix param min/max values and descriptions as well as some variable names which were wrong/outdated (#9708)

If the PX4FMUv2 board does not have the v5 uploader, it's not possible
to check the silicon revision to make sure it's safe to upload the
firmware which is more than 1 MB. However, if the user is sure the
silicon revision is not affected by this errata, he can upload the
firmware using px4_uploader.py with --force argument. This commit adds
`force-upload` make target to do it more convenient way.

Signed-off-by: Andrei Korigodski <akorigod@gmail.com>

* ecl: Update to version allowing use of flow sensors without gyros

* msg: Update description for optical_flow

Adds advice for publishing gyro rate integral message when no rate gyro is fitted.

Uninitialized `_ping_stats.last_ping_time` caused ping statistics to be printed even when no ping was received.

The uorb subscribe logic got changed for queued topics with
https://github.com/PX4/Firmware/pull/9436, meaning an orb_subscribe will
return past messages as well now.

This lead to an error 'Command denied during calibration' for the previously
received calibration start command.

    - sitl_gazebo in PX4/Firmware (ebc40067): https://github.com/PX4/sitl_gazebo/commit/8a3166bf5d315274cfd503a75880e9837faa9694
    - sitl_gazebo current upstream: https://github.com/PX4/sitl_gazebo/commit/b5a92095bfb1b6a218a80f58ad9fe09c89ef4598
    - Changes: https://github.com/PX4/sitl_gazebo/compare/8a3166bf5d315274cfd503a75880e9837faa9694...b5a92095bfb1b6a218a80f58ad9fe09c89ef4598

    b5a9209 2018-06-10 TSC21 - travis_ci: Add OSX build

This sets all channels to zero, including unused channels. Any consumer of the data using the channel count will not see a difference, but this is helpful to avoid confusion in log analysis.

    - apps in PX4/Firmware (1bc4a73eaacdb40f7d3f5ebd11882913b541b419): https://github.com/PX4-NuttX/apps/commit/7e2f17db4e770e65ee39b1a964cf4644720d976c
    - apps current upstream: https://github.com/PX4-NuttX/apps/commit/36806ba3d84c0fa07ed86857d4c92a997b7cd194
    - Changes: https://github.com/PX4-NuttX/apps/compare/7e2f17db4e770e65ee39b1a964cf4644720d976c...36806ba3d84c0fa07ed86857d4c92a997b7cd194

    36806ba 2018-06-06 Beat Küng - nsh_parse.c: fix 'while' and 'until' loop condition

    - v2.0 in PX4/Firmware (a19fecad): https://github.com/mavlink/c_library_v2/commit/653ac745a57794a38c831f1ff296066a2e09c09b
    - v2.0 current upstream: https://github.com/mavlink/c_library_v2/commit/033fa8e7a4a75a0c3f17cea57e3be8966e05f770
    - Changes: https://github.com/mavlink/c_library_v2/compare/653ac745a57794a38c831f1ff296066a2e09c09b...033fa8e7a4a75a0c3f17cea57e3be8966e05f770

    033fa8e 2018-05-24 PX4BuildBot - autogenerated headers for rev https://github.com/mavlink/mavlink/tree/d8ea87b9c6173ad72a032219588e302eb8cb212a

   Refactored for efficiency and simplicity.