GitLab

Configure Secret Detection in `.gitlab-ci.yml`, creating this file if it does not already exist

See merge request !5

 As of this commit the control subsystem works for the glfw
 windowing code path. At the moments only the esc, w and s keys
 are assigned, but the rest can be added by modifying the
 glfwKeyTranslation class. Each key need to be added in the
 constructor which is simply tedious so it is not part of the
 initial support.

 This add the initial code for glfw3 as window manager.
 As of now this only creates a black window that can be closed
 by pressing the x in the top right.
 Control will work in the next commit and rendering after that.

 This commit add all of the glad source files.
 Glad is a loader for opengl commands and makes it easy to
 ensure that all of the needed features are fully loaded.

 This commit just updates the wrap files and adds a wrap file for
 glfw3 and glm.

 This add a new documentation file which contains a desription
 of the values used for the train json files.

0.9.2 has the memory fixes and several documentation updates

This way a simulator can be stopped when the end of a video file is reached, without crashing.

frames are now only passed as shared_ptr. This new design fixes the memory problem mentioned in #17. In addition to that there is no longer a need to worry about clearing the frames, since this is done automatically in the destructor. This is possible since teh destructor only gets called, when the last reference to that address is deleted, so the 

using the docker images in from gitlab registry    Now the docker images in the docker-containers repository are used. They are built on the gitlab CI and published to the thm gitlab. This reduces the dependency on external containers.

Final Work of BBB

See merge request !3

Added some small comments to physics::tick()

 This version is a hotfix that get the control working properly again.
 Before the line that checked if sdl is available actually checked if
 for opencv. This broke the builds that used sdl2 without compiling the
 opencv code.
 Because of the size and the importance of this fix, this will be a
 new patch release version.

Added documentation of Physics.cpp in German and fixed a few typos
within the naming of the types of drag

 THis commit changes the library version to 0.9.0 and the format
 version to 0.6.0. The new format version break compatibility
 which is caused by the new physics.

 There is also an update for the train_properties json
 format in this commit. This just explains the format changes in
 format 0.6.0.

 the unit test failed because the value in the test and in the
 test_train_data_1.json did not match.

Final work of BBB

See merge request !2

changed default value of track_drag, the renaming will come later

added my tested train to core/tests/data in order to get the right
values

moved 2 functions from public to private and removed some lines which
are not needed any more

rewritten the documentation of nearly all functions in physics.hpp
changed the variable named track_drag to the better name of train_drag

Moved some varables from .hpp to void tick() including constant
variables which are defined by Train.json

Added the documentation of the physics.

solved some issues mentioned from @nkrs14

small bugfixes in physics.cpp cause the abs function doesnt work for
speedlevel. The problem of small values is now fixed in a other way

improved the issues @nkrs14 mentioned - smaller bugfixes and removal of
unnecessary lines.

removed some unnecessary, commented lines

when speedlevel is zero nothing will be done in physics to pretend
driving without accelerate