added more specificity for IE for the buttons
Merge pull request #547 from shawnthompson/btn-default

added more specificity for IE for the buttons
Updated files for the v4.0.0 Beta 2 release
Merge pull request #549 from pjackson28/v400b2release

Updated files for the v4.0.0 Beta 2 release
Update build version to v4.0.0-rc1-development