Fix compatibility with server versions below 1.7

Yesterday I was debugging some plugins with the newest version. I figured out that HoloAPI from dev.bukkit.org doesn't work for 1.7.10. Therefore I downloaded the version from your Jenkins server. 

Just to check the compatibility of the plugins, I also tried 1.6.4. 
The first one is already fixed in the newest build of Commodus (YamlConfiguration.loadConfiguration(Reader)).
The second one (See Exception) still appears after updating all dependencies. So I wrote this little fix. After replacing the build. The plugin start ups fine and the command help works. Nevertheless the hologram creation still don't work, but this has nothing to do with this project as it can't find netty.

Plugin build: 443
Exception: https://gist.github.com/games647/9af48a26ab2ba52511f1
Tested with: Bukkit-1.6.4-R2.0-b2918jnks
Tested with and without other plugins