Add theme.rb into gem if it exists
Remove trailing spaces
Add missing GetText module inclusion

[shocker-en:63] Graffiti Mode/Change Graffiti Color error

Reported by Enrico Rivarola. Thanks!!!
Use universal analytics
slide-configuration: accept YouTube ID
Add convert_codespan method to Rabbit::Parser::Markdown::Converter
Add convert_br method to Rabbit::Parser::Markdown::Converter
Add Slide class to manage pages

In the current implementation, Canvas class manages pages in a
slide. I want to move the feature to the Slide class.

But there is a problem. I used "slide" for "page" in a slide. :<
Rabbit::Element::Slide should rename to Rabbit::Element::Page.

I need to rename it before I use this class in Canvas class. Because
it is confused. It breaks backward compatibility of theme API... I
need more work for theme...
test: add for Markdown parser
Merge pull request #29 from KitaitiMakoto/markdown-improvement

Markdown improvement

Patch by Kitaiti Makoto. Thanks!!!
travis: enable
Remove a debug code
Add 2.1.2 entry
Update the latest Rabbit release
Update po
Fix mo base directory
Remove needless "ruby" helper
test: fix base directory
travis: use the latest 2.1 series
travis: ignore error on ruby-head