Append Unite source.
Rewrite README.md
Fixed bug in plugin/alpaca_english.vim
Merge branch 'development' into HEAD
リファクタリング
SQLiteを分離
Append options to complete function.

- g:alpaca_english_enable_duplicate_candidates
  - If you enabled, it would allow duplicate candidates

- Append info to complete function for preview feature.
Append Say.vim
Fix bug

- Append condidates for ^ and $
Implement thesaurus complete.
Refactoring
Fixed bug
Append ignorecase varialbe for alpaca_english_say.
Fixed occurd error when system hasn't required gem.
Append gemfile as a solution for probrem of depends.
Amend README.md
Replace ruby's code into lib directory.
Replace ruby's code as module to lib directory.
Remove unused files.
Move module to correct position.