Update to build 149

- Added bukkit-repo
- Added oss-sonatype-repo
- Added 'backpack clear <player>' command
- Fix 'backpack reload' not checking for permission
- Namespace changed from com.almuramc.backpack.bukkit to simply com.almuramc.backpack
- Removed redundant listing of build number
- Updated to maven compiler 3.1
- Updated to Bukkit/SpoutcraftPlugin 1.6.4-R2.1

Signed-off-by: Steven Downer <grinch@outlook.com>