added documentation on how to set up Bundler for Development
updated the How to set up bundler for development
updates to Bundler for Development
deleted white spaces ?
white space gone
Merge pull request #2558 from jendiamond/bundlerfordev_doc

Added documentation on how to set up Bundler for development
expand contribute, mention alias
Load current_ruby from shared_helpers.rb

In case of commands run via bundle exec, we do not require all of
bundler in that environment and we only require bundler/setup there.
Which creates problems because Bundler is unable to find current_ruby therej
Merge pull request #2562 from bundler/fix-current-ruby-for-exec

Load current_ruby from shared_helpers.rb