Add aliases to stationary water & stationary lava

New changes:
stillwater is an alias to 9:0 (Stationary water)
stilllava is an alias to 11:0 (Stationary lava)
Travis - use Maven to build
Remove Ant, migrate Netbeans code style to pom.xml
Use the Essentials Maven repository
Add deploy plugin
Add permission: essentials.msg.multiple and essentials.pay.multiple
Message permission will allow rough nick matches and wildcards, while pay will only allow wildcards.
Fix NB parent compiling
Remove redundant permission check.
Add and implement sign break/create/interact events to EssAPI
Implement AfkStatusChangeEvent
Check command cost, before running kit delay check, prevent accidentally delaying unran commands.
Add an upload-only pom file for GroupManager
Reset Exhaustion on /feed
Config description cleanup.
Pass optional location parameters to teleport TL keys.
Fix hidden groups in /list
Update to Bukkit Development Builds