Merge pull request #5 from ialbuqu/master

Added delete feature
Merge pull request #6 from ialbuqu/master

Added close bill feature
updated .rvmrc to use ruby 2.0.0 and billbo gemset
fix bundler problem. update ruby version
Merge pull request #8 from ronualdo/master

fix bundler problem. update ruby version
Merge with upstream
Changing name of method and variable to follow good naming practices