changed "missing frame" message to "caching" which is more appropriate from an user viewpoint
Merge pull request #33 from primefocusworld/upstream

changed "missing frame" message to "caching"
Adding missing cstddef

thx @cpichard
fixing header extension
fixes #34 --max-cache-size flag
Merge branch 'max-memory' into develop
Merge remote branch 'upstream/develop' into primefocus

Conflicts:
	src/duke/memory/AvailableMemory.hpp