Updated readme and gem homepage
Version bump
linux compatability fixes - mkdir and require rmagick
Fixed missing tiles due to rounded down floats
Version bump
updated readme contrib instructions
ensure equal size of edge tiles
Added extend_incomplete_tiles option to lib/tileup.rb
Added dont-extend-incomplete-tiles cli option
Added changes file
Version bump v0.1.3
Merge branch 'release/v0.1.3'