Added event support for wrap-only

Compatible with type methods

Fix issue thingsdb#12

Added optional __COLLECTION_NAME__ argument and attach enum to collec…

…tion

Fix multiple event handlers, resolves thingsdb#9

Added Emitter class, issue thingsdb#8

Merge pull request thingsdb#7 from thingsdb/imprenum

Better enum support

Fixed issue thingsdb#5

Merge pull request thingsdb#4 from thingsdb/emit

Added support for emit event

Added mod_enum set default