Update development dependencies
Add a `.rspec` file.
Enforce suite random order
Update test cases to use RSpec 'expect' syntax.
Remove warnings
Use Ruby 1.9 Hash syntax
Remove ivar not initialized warning
Mutate the right `env` object.
Use Ruby 1.9 Hash syntax
Extract increment operation to a method
Use single quoted Strings when possible
Fix Hash formatting
Merge pull request #16 from plataformatec/lm-dev-cleanup

House cleaning