fix caching of template paths, closes #1634
name local variables for partial collections properly, fixes #1636
move Padrino::Rendering to padrino-helpers
register Rendering automatically with Helpers
separate mock_app of padrino-core and padrino-helpers
add a fail to avoid `stack level too deep` errors on some rubies and hacky module usage
check the existence of Padrino::Application
Add changelog for 0.12.1 changes
Merge pull request #1638 from padrino/move-rendering

Move rendering to padrino-helpers
fix commit authors, split into sections
do not fail rake if padrino-gen is not bundled
allow to run console without irb/completion and readlines, fixes #1640