Add .sass-cache to .gitignore
Fix Maruku template tests
Update .travis.yml:

Use latest rbx, ruby-head and both 1.8 and 1.9 mode for JRuby.
Don't test for BlueCloth by default:

Loading BlueCloth and RDiscount at the same time causes some problems
for Travis-CI. Concidering that RDiscount is more maintained than
BlueCloth, I'm just going to drop BlueCloth from the Gemfile for now.
Added to_path method to the allowed methods in constructor

This allows to pass a Pathname object to the constructor
Added a friendly exception message
test passing Pathname object to constructor
Fix Pathname test in 1.8
Bump version
Update changelog
Use HTTPS RubyGems source

The HTTP one is deprecated.
Tilt does not explicitly need tilt/template

This fixes a Ruby warning when requiring 'tilt':

> warning: loading in progress, circular require considered harmful
Fix unused variable warning
Update CHANGELOG
Allow failures in Rubinius
Fixed tilt --list
Fix Mapping#constant_defined? in Ruby 2.1.0:

Ruby 2.1.0 changed the behavior of Module#const_defined?. Previously it
would always return true if the constant was autoloaded, now it will
attempt to the load the constant.
Update rubies for Travis
Update CHANGELOG
Add workaround for failing build on Ruby 1.8.7

Rubygems broke builds on Ruby 1.8.7:

travis-ci/travis-ci#1793
rubygems/rubygems#763

This patch is a temporary workaround until rubygems is updated.