acu145407 use proper debugger for all rubies

Gemfile fixes:
use https source
replace " with '
add ruby_20 platform
use :platform, not :platforms
acu145407 update rconf file with latest bundler
acu145407 update gemspec file
acu145407 add Ruby 2.1 support
acu145407 update rconf to latest bundler
acu145407 fix gem dependencies; merge in stuff from master

Remove right_develop since it depends on right_support!
This means spec and cucumber must be specified in Gemfile directly.
It also means that the CI rake tasks are gone.
Remove debugger gems.

This should work for Ruby 1.8, 1.9, 2.1

Merge remote-tracking branch 'origin/master' into salmon_13_20_acu145407_ruby19_and_ruby_20_compatibility

Conflicts:
	Gemfile
	Gemfile.lock
	right_support.gemspec
	right_support.rconf
acu145407 missing cukes
acu145407 update to latest jeweler gem
acu145407 fix to Ruby 1.8-compatible mime-types gem
acu145407 bump version
acu145407 update gemspec
Merge pull request #108 from rightscale/salmon_13_20_acu145407_ruby19_and_ruby_20_compatibility

Salmon 13 20 acu145407 ruby19 and ruby 20 compatibility