Rate changes were doing an asynchronous register reload via the EGR_UG. This could extend a PWM pulse up to 2X.

This fix removes the asynchronous update. The net effect is the the rate change will occur on the next counter expiration. The worst case is the rate change is delayed by 20 Ms.

* refactor ekf analysis part 1: move plotting to functions

* add plot_check_flags plot function

* put plots in seperate file

* use object-oriented programming for plotting

* move functions for post processing and pdf report creation to new files

* add in_air_detector and description as a csv file

* refactor metrics and checks into separate functions

* refactor metrics into seperate file, seperate plotting

* ecl-ekf tools: re-structure folder and move results table generation

* ecl-ekf-tool: fix imports and test_results_table

* ecl-ekf tools: bugfix output observer tracking error plot

* ecl-ekf-tools: update batch processing to new api, fix exception handling

* ecl-ekf-tools: use correct in_air_detector

* ecl-ekf-tools: rename csv file containing the bare test results table

* ecl-tools: refactor for improving readability

* ecl-ekf tools: small plotting bugfixes

* ecl-ekf tools: small bugfixes in_air time, on_ground_trans, filenames

* ecl-ekf-tools: fix amber metric bug

* ecl-ekf-tools: remove custom function in inairdetector

* ecl-ekf-tools: remove import of pandas

* ecl-ekf-tools: add python interpreter to the script start

* ecl-ekf-tools pdf_report: fix python interpreter line

* px4-dev-ros-kinetic: update container tag to 2019-02-13

* ecl-ekf-tools python interpreter line: call python3 bin directly

* ecl-ekf-tools: change airtime from namedtuple to class for python 3.5

* ecl-ekf-tools: update docker image px4-dev-ros-kinetic

* ecl-ekf-tools: fix memory leak by correctly closing matplotlib figures

 - see 1259864 Data corruption in a sequence of Write-Through stores and loads
 - if we can be certain this sequence won't occur in PX4 then the d-cache will be re-enabled

changed: "Mission rejected: land start required."
to: "Mission rejected: landing pattern required."

This new message is more clear to the average user.  When using RTL_TYPE = 1, mission feasibility checker adds the requirement of a landing sequence beginning with a MAV_CMD_DO_LAND_START and ending with a MAV_CMD_NAV_LAND with at least 1 other waypoint prior to the land waypoint.  The warning message "Mission rejected: land start required." is a common warning to trigger whenever the mission is blank or the mission is uploaded without a landing pattern.  The wording in this message confusing to the average user as they usually do not know the inner workings of the "landing pattern" that their planning software helps them make (e.g. Qgroundcontrol).  The only users who would know what a "Do_Land_Start" mission item is are advanced users already and this new message should work equally well for them as well as the non-advanced user.

changed: "Preflight Fail: Horizontal estimate Pos Error"
to: "Preflight Fail: Horizontal position estimate Error"

The comment description for COM_POS_FS_EPH incorrectly stated "...horizontal position error (EPV)...".  This fixes the acronym to "(EPH)".

The previous code used the numeric baudrate as the speed argument
for cfsetispeed() and cfsetospeed(). This works in OSX and NuttX,
but is not portable.

This fix introduces a new method to convert baudrate to speed using
constants such as B115200.

Signed-off-by: Gabriel Moreno <gabrielm@cs.cmu.edu>

mc_pos_control - reduce smooth_velocity_takeoff default threshold, set initial takeoff speed to 0 and remove useless else

PositionControl - use dynamic constraints to saturate velocity controller for now as it is needed for the current smooth takeoff logic. Will be reverted after smooth takeoff refactor

Position Controller - Saturate the controllers using static parameters. Handle saturations in the flight tasks only

Manual vel smooth - use speed_up and speed_down constraints to limit velocity target of the trajectory generator

 - also applies to mission_stats_entry_s, mission_fence_point_s,
   mission_save_point_s
 - -Wpadded warning is disabled by default because the snapdragon
   toolchain doesn't respect the pragma pop

Fixes regression from https://github.com/PX4/Firmware/pull/11216.

 - Remove a constructor overload by adding default values, and disambiguate a few variables by adding verbosity to naming. 

 - see 1259864 Data corruption in a sequence of Write-Through stores and loads
 - if we can be certain this sequence won't occur in PX4 then the d-cache will be re-enabled