Add permission check before resetting speed on login The staff of my server asked me to do this fix, but I think it is very useful for all. This commit change is to reset player fly & run speed only if player has no permission to change speed.
Optimize player / user iteration.

* Add a method for backwards compatability with unmapped code.
* Convert all getOnlinePlayers() calls to use this method, part of the IEssentials interface
* Add a new method getOnlineUsers() Ljava/lang/Iterable;
* Convert appropriate calls to use this method
* Update Bukkit to #1945
* Update CraftBukkit to #3103
Fix sticky piston retract breaking essentials sign

Sticky pistons could break signs that were mounted on blocks the pistons were retracting.

This patch extends the protection from just the piston base to include the extended piston arm and the block at the end of the piston arm as well.

This method will very likely need to be changed again when 1.8 comes out, but this should bring us a bit closer, by wrapping the block tests in a loop.
Formatting fixes.