Adding a method for converting a color to transparent.
Better docstring
Adding a basic test. No warranty it will pass
Correcting the test for transparent_color
Merge pull request #98 from lkoenig/master

Adding method for painting a color in transparent
Fix wrong variable names  #98
Coding style  #98
Changelog  #98
Fix some docs errors  #98
Remove signatures from composite_channel test  #68
Remove signatures from composite_with_xy test  #68
Separated composite_with_xy test seem needless #68
Remove signatures from reset_coords test  #68
Remove signatures from channel_images test  #68
Test only essential channel_images to pass  #68
Add '-6.Q16' suffix

Because Arch Linux is using yet another suffix.

https://www.archlinux.org/packages/extra/i686/imagemagick/
Merge pull request #102 from stereohead/patch-1

Add '-6.Q16' suffix
Remove signatures from liquid_rescale test  #68
Remove signatures from draw_text test  #68
Left position of text can vary  #68