Rabl -> RablRails
Merge pull request #54 from krautcomputing/patch-1

Rabl -> RablRails
Master is now 0.4.0
Allow to omit format in template name [Fixes #51 #48]
Make xml_options accessible from RablRails [Fixes #46]
Update changelog
Prepare for 0.3.4 release
Visitor pattern
Simple render working
Replace renderer by visitor and classes my modules
Avoid calling #to_s each type a glue or child node is rendered
Make partial works inside visitor
Fix compiler test with nodes
Make test pass for JSON
f
Change test to reflect new structure
More tests
Refactor library class
Add thread_safe as a dependency
Change renderers test to only test renderer code