Fix to working unite#complete in Command-line-window.
Merge pull request #221 from DeaR/vim-completefuncs

Fix to working unite#complete in Command-line-window.
- Deleted debug message.
- Improved vimfiler candidates initialization.
- Improved for vimfiler.
- Fixed regex pattern for NFA engine.
- Lock neocomplete.
Mereged
- Deleted default substitution.
- Fixed lua matcher.
- Fixed vimgrep source error in latest Vim.
- Improved matcher_fuzzy.
- Improved for auto completion.
- Fixed matcher_head error.
- Fixed syntax error.
- Fixed syntax clear problem.
Add FAQ in README (for github)
Merge pull request #230 from ujihisa/master

add FAQ in README
- improve document: add a recommended post
Merge pull request #232 from UncleBill/master

improve document: add a recommended post