…and write the log results into a file.

The LogManager has been added to the service locator and can be accessed with "Log"

- Added a constructor
- Added a Start, Wait and Close method to manage the LogManager thread

- Put some critical variables as atomic
- Added a LogManagerStatus enum to get the status of LogManger at any point
- Added a LogCategory enum to sort each log message in separate categories
- Added constructors to take LogCategory into account
- Put some redundant chunk of code directly in methods in the LogMessage struct
- Changed how the execution loop is performed

Other miscellaneous changes:
- Added a log message for when writing the log file
- Added a new test in test_logger.cpp

- Better handling of critical section
- Removed unecessary LogManager instance
- Changed Log tags order

…raph

…ngine into sprint2_logger

…ngine into sprint3_physfs

PhysFS can be toggled on/off and the tests in 'tests/physfs/' will be
toggled with the wrapper

…t comp_graph sync by moving manage event into sync

…ow and adding keyboard and gamepad controls to imgui

…changing context between thread

…ation

…File with no RAII

…faster) + corrected the benchmark

# Conflicts:
#	CMakeLists.txt
#	cmake/neko_executable.cmake
#	common/gles3_wrapper/CMakeLists.txt
#	common/gles3_wrapper/src/shader.cpp
#	common/sdl_engine/src/gl/gles3_window.cpp
#	core/include/engine/custom_allocator.h
#	core/src/engine/custom_allocator.cpp
#	core/src/engine/log.cpp
#	core/src/utilities/file_utility.cpp
#	core/src/utilities/json_utility.cpp
#	test/CMakeLists.txt
#	test/test_custom_allocator.cpp
#	test/test_jobsystem.cpp

…ngine into sprint3_physfs