v1.4.0

Updated build now allows linking to external pugixml and zlib libraries instead of the included source files for pugixml and miniz. Either set the option USE_EXTLIBS to TRUE when configuring CMake or meson, or add -DUSE_EXTLIBS to your compiler command and link the libraries as appropriate.

New TMX features:

• Support Map property parallaxorigin
• Support Layer property parallaxoffset (thanks @ironpowertga )
• Support Layer property colortint

New Library features:

• ostream operator overloads have been added to make printing the values of Vector2<T>, Rectangle<T> and Colour types easier

Fixes:

• Animated tiles are properly cleared when reloading a map file (thanks @ldornbusch )