Implementing TMX file loading and parsing into Map objects
Loading map data from TMX files. Now need to store this for Maps to use.
Loading maps
Working on loading in maps
API change
API change observed
Further work on map loading
Adding multiple layers to maps
Rendering and loading maps now working
Resolved conflicts
Back to original scaling
Basic  map scrolling added
Conflict resolution: Used master main.cpp
Callbacks are now ordered.
Merge branch 'master' into input-management
Maps loading and rendering with multiple layers
Resolved conflicts
Added sdl2image library dependency in README
Fixing Makefile
Defining API calls