* 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
