Convert region ID to lowercase when saving polygon points to MySQL database. Check number of points in polygonal region before registering it.
     When saving the points of a polygonal region to a MySQL database, the region ID was not converted to lowercase. If a region ID contained a capital letter, upon reload no points would be found, causing an out-of-bounds exception and essentially leaving WorldGuard unuseable.
Merge pull request #315 from eswick/master

Convert region ID to lowercase when saving polygon points to MySQL database.