Remove indirect monkey-lib dependency
Remove deprecated sinatra-sugar extension base gem
Add caller_files fix for 1.8.7

simple replacement for sinatra-sugar ignore_caller

https://github.com/rkh/sinatra-sugar/blob/master/lib/sinatra/sugar.rb
Move rbx to compatible ruby versions
Add gemfile.lock to keep track of tested version
Cleanup gemspec & remove BigBang mention
Update test to sinatra-contrib 1.4 & other gems updates
Merge pull request #8 from hooktstudios/feature/no-monkey

Remove BigBang/monkey-lib dependencies for rbx support. Fix #6
Release v0.5.3