* Fix various compilation issues.
Mostly errors on field initialization order but also missing files
in CMakeLists and missing include directives.
* Fix compilations issues with GCC 6.2
* Fix gitignore libs/ entry to not ignore the Android external libraries.
Ported tests:
- js-tests
- cpp-tsts
- lua-tests
- game-controller tests
all of them working, but most of the tests can't be navigated
since they expect a controller.