Add MCPC+ support for registering entity

This will make the plugin work with MCPC+ servers by inspecting the other potential names the desired method could have.
In order to assist with the behavior of stopping on success, the registration is extracted to a function.

Note that method.setAccessible(true) is not called in "Production environment" - this is because Forge makes the method public.
Merge pull request #1 from riking/mcpc

Adding MCPC+-support
Move folders around to prepare for mavenization
Add working pom.xml
Merge pull request #2 from riking/maven

Mavenize the project
v0.0.0.9

- Fixed:
- Payment-item not read from the config but from a debug-line leading to
a permanent use of gold nuggets
- Exception when checking for stations around the player (because of
MountingLimit) when a station has a 'world'-property whose world does
not exist.
- Possible NPEs when a player isn't on the dragon when DragonTravel
tries to dismounted him
- Added:
- MCPC+-support (FINALLY!!)
- Permission-Check for the "/dt reload"-command
- Check for config-option "OnlySigns" for flights
- Message for the above check to the new Message-file version
- Nicer message when trying to run an outdated version of DragonTravel
- Possibility to send a player on a flight from console
- Misc:
- Small changes in the messages-files (fixed typo and moved a phrase)