Switch to Yamler and remove most of the old config stuff (*cries*) in preparation for #7

Also output version information on /cbu and add more user-friendly error messages.
Bump ProtocolLib version and make plugin name conform to standards
Change admin permission default to OP
Actually not insignificant typo in version output
Another typo, this time the adjective is weird.
Write config to disk after loading to ensure new options are available
Add ConfigAdapter interface for further abstraction, Move #getRawCommand() from CBUConfig into new utility class CommandHelper. In preparation for #8
Add Spigot-specific YamlConfiguration ConfigAdapter. Closes #8
Undo renaming Spigot plugin to CommandBlockerUltimate_Spigot since it doesn't make sense and breaks existing folders
Merge branch 'master' into yamler-config-api
Merge branch 'yamler-config-api'
Remove duplicate JavaDoc in CBUConfig
Add Yamler soft dependency in cbu-spigot's plugin.yml
Improve a config comment
Fix tab-completion handler not stripping slash and therefore not blocking anything
Add API to remove command prefix (e.g. bukkit:kill -> kill)
Resolve a possible exploit using MiXeD CaSe
Automagically resolve command aliases!
Fix an error with Yamler not supporting Sets

Obviously, this happens the only time I push and don't test before
Remove ConcurrentModificationException demon

Still happening...