Merge conflict-release

This release fixes a ton of internal bugs, but not many that the average users will notice, much more along the lines of increased the amount of shared code, and decreased the amount of duplication.

Honorable mentions:

• New defaults for WorldGuard Flags
• Removed "internal-island-protection" (WorldGuard is now a must).
• Added Multiverse-Core as a softdepend (since it already was one).
• Added tab-completion to the /c command
• Moved challenges to a separate config file (challenges.yml)
• Re-did the config reading, so it's now guaranteed to be UTF-8 regardless of system-encoding on the server.
• Added word-wrap on the UI lore for challenge-descriptions.
• Better (total rewrite) logic for calculating onIsland challenges
• Faster island level calculation
• Challenges SHOULD now reset their requirements when the cooldown expires (not on next completion).
• and probably a lot more ...

Note: This release has NOT been very thouroughly tested, so feel free to test it, and report any errors you find (also, a helping hand in indicating which of the existing errors has been fixed, would be most appreciated).