Bumped version for devel
Updated Changes
Added travis-ci config
Added tile_class attribute

Moved width and height to METHODS section of the POD, where they
belong.
Updated Changes
Added tile_class attribute to the top level
Updated prereqs: aliased no longer used
Fixed versions on submodules
Better type checking for tile_class
Recommends Type::Tiny::XS
Merge pull request #5 from robrwo/devel

Various changes