- needed for cmake packaging

  This will disable the fxos8701cq internal mag on
  the NXPHlite. There are random noise spikes on the
  HIGHRES_IMU.[x|y|x]mag. Even with all other SPI
  devices shut down, the noise is still present.

It seems that the oneline to find the process ID of any running jMAVSim
instance was not working correctly.
1. On Linux, the name of the process does not contain Simulator but
   jmavsim_run.jar. Also, it triggers incorrectly, if you have opened
   Simulator.java using the command line :).
2. The cutting to get the PID at the end does not work as intenteded and
   gives the username instead of PID, at least on Arch Linux. Using awk
   should fix this.

This adds text to markdown output to explain how params are generated

MPU6050: fix implicit float to double conversion

Added an imu heater driver, formatted whitespace, standardized comments, and added doxy documentation.

    - DriverFramework in PX4/Firmware (060463e8): https://github.com/PX4/DriverFramework/commit/b439556d54aa53532586e69de87cc720af4543c2
    - DriverFramework current upstream: https://github.com/PX4/DriverFramework/commit/c85f446f3ae3aa7707b4dfaf20486b0b75897042
    - Changes: https://github.com/PX4/DriverFramework/compare/b439556d54aa53532586e69de87cc720af4543c2...c85f446f3ae3aa7707b4dfaf20486b0b75897042

    c85f446 2018-09-06 Daniel Agar - mpu6050 fix abs double promotion

Edit the init.d-posix files to set MAV_TYPE script variables, and alphabetize lists in a few places.

Set parameters directly rather than script variables in VTOL airframe config files and alphabetize lists.

Starting with cmake version 3.12 the cmake -E copy_directory
command fails if the source directory does not exist. This results
in a build failure. This fix creates the source directory before
the copy which does not harm if the source directory exists.

Closes: #10368

Not needed anymore, use PX4_ESTIMATOR.

 - this allows interacting with the submodules check

 - remove radio_status type since there's no type support in mavlink

    - ecl in PX4/Firmware (e421c254): https://github.com/PX4/ecl/commit/3c74dc2ce1002db5b68a833fdd0aa964210e91f5
    - ecl current upstream: https://github.com/PX4/ecl/commit/b861594d0b2f8c476cb758f9ae22c83e14920dfe
    - Changes: https://github.com/PX4/ecl/compare/3c74dc2ce1002db5b68a833fdd0aa964210e91f5...b861594d0b2f8c476cb758f9ae22c83e14920dfe

    b861594 2018-09-01 Paul Riseborough - EKF:  enable optical flow use to bootstrap

    - genmsg in PX4/Firmware (92b52c56af728741b4ac9f57e583350b0fcd7c3b): https://github.com/ros/genmsg/commit/a189fc78558e7276df59d2961cfe4f8b4de08a8b
    - genmsg current upstream: https://github.com/ros/genmsg/commit/42e364661025b8f3d51486dc513d9e29cbd308da
    - Changes: https://github.com/ros/genmsg/compare/a189fc78558e7276df59d2961cfe4f8b4de08a8b...42e364661025b8f3d51486dc513d9e29cbd308da

    42e3646 2018-08-27 Jochen Sprickerhof - Use CATKIN_GLOBAL_ETC_DESTINATION for etc (#79)