Rename internal names to g:tmuxcomplete#option_name
Add option g:tmuxcomplete#trigger

Supported values:
- 'completefunc' (default)
- 'omnifunc'
- '' (no trigger)
Add neocomplete integration
Update Readme about trigger otpion and neocomplete integation
Update version to 0.0.2
Merge pull request #30 from wellle/neocomplete

Add neocomplete integration