SanderMertens#124 add more observer tests, fix issues

SanderMertens#472 fix buildsystem CI failures

SanderMertens#124 fix potential memory corruption in table storage wh…

…en using switch columns

SanderMertens#472 add comment to amalgamated file for when using it a…

…s DLL

SanderMertens#124 add pair tests for filters

SanderMertens#124 add switch to disable colors in tracing

SanderMertens#473 fix issue with calling ecs_get_object from stage

SanderMertens#124 update amalgamated source

SanderMertens#124 update amalgamated source

SanderMertens#124 update CHANGELOG for release