More updates/tweaks to design builds

* Another buildsPath fix
* Better error handling in test reset
* Add sublime text to .npmignore
* Add a preview link for Live
* Fix preview link for staging
* Wipe logs in grunt prepublish
* Async fix
* Bump to rc2
More Builds updates

* Implemented GET /buildfiles/?type=template, fixed template chooser in Routes view (w/test)
* Bugfix: Clear live HBS cache when live build is updated (w/test)
* Bugfix: Don't invalidate on md5 if the selected build has BuildFiles (md5 is no longer accurate)
* More error-catching for FS calls
* Update client file naming from Template -> BuildFile

RC3
Bump to RC3