BUGFIX: Config merging arrays. Switch to map.
Update README.md
first pass at versioned support
BUGFIX: Remove Buttons.php
BUGFIX: Remove Buttons.php
Merge branch 'master' of git://github.com/unclecheese/silverstripe-gridfield-betterbuttons
A number of enhancements and bug fixes for verioned support.
Merge branch 'versions'