Bukkit

Changed update checking to only check on plugin enable, and to let those with permission know that an update is available. This should reduce any lag the plugin may have to a minimum.

added a requested config for "notifymustbenight" default is false.

added a lang variable for "respawnpointmsg" will now say Respawn point set, or whatever you change it to in the lang file.

changed lang files to be language specific lang/en_US.yml instead of lang.yml

some minor tweaks to code to streamline and simplify how SPS works.

To report any issues please start an issue on the SinglePlayerSleep github repository with debug=true, and a full log.