Add config option for rank that can spawn fmobs
Add boolean in main class
Add method that checks if a player can spawn fmobs

Support for each version of factions included, factions 2 uses different names so I added support for that
Fix rank names
Add a check at the spawn command
Small fix to prevent naming issues
Fix mistake

I accidently put the factions permission check in the wrong spot, tested and fully works now.
fix other mistake
Add missing import
Remove multi catch statement to support Java 6
Rename ranks and option

mustBeAtleast was renamed to minRankToSpawn
Faction ranks were renamed to match 2.0 names, but kept backwards compatibility for 1.6
Change system to check Faction rank

Create FRank class to simplify and generalize usage of faction rank
Add method in FPlayer to get a player's faction rank