Up the version to 1.2.0 development
Initial downloader implementation
Tests for the downloader
Translation for downloader error
Return the value of the yielded block in Busy
Download boxes using CURL!
Remove downloaders, no longer needed
Setup file protocol if adding a box from a file
Properly accumulate and parse cURL output for progress
Fix cURL parsing with invalid blanks
Respect the "disabled" flag for shared folders for VirtualBox [GH-1004]
Update CHANGELOG for cURL stuff
Provider plugins can provide arbitrary options
Allow override of default_provider

Set the VAGRANT_DEFAULT_PROVIDER environment variable to override the
value of default_provider.
UI objects use "scopes" now
Make the Basic/Colored UI objects threadsafe
BatchAction for running actions in parallel
Run "up" in a batch action so it parallelizes
Environment#batch and forcing disable through env var
Up command now uses Environment#batch