Updated maven dependency to target bukkit 1.7.2
Updated maven dependency to target Vault 1.2.27
Updated maven dependency to target metrics R7
Fix problem with building on Maven, solution borrowed from https://github.com/Parquet/parquet-mr/issues/125#issuecomment-22554047
Reduce the usage of deprecated ItemStack constructor. Suppress the warning where not possible.
Don't use wrapper classes for primitive types where not necessary, it reduces performance.
Added permission to allow free catches despite costs in configuration file.