Merge pull request #772 from bvssvni/master

Added generic `Character` based on the one opengl_graphics
Merge pull request #773 from bvssvni/master

Added `CharacterCache` trait
Merge pull request #774 from bvssvni/master

Fixed `char` argument type
Merge pull request #775 from bvssvni/master

Added `Text`
Updated REDME
Updated dependency graph