format and add comment
check strftime exectuable

* strftimeが実行出来ない場合の考慮を追加
update doc
change markdown parser

* showdown -> marked
update help
tmp commit
URLエンコード(半角空白のみ)対応
g:previm_open_cmdに半角空白が含まれていると失敗するバグを修正
changelog ver 1.3.2
Changed CSS from bootstrap to GFM-like styles
Merge pull request #6 from seiichi/gfm-css

Changed CSS from bootstrap to GFM-like styles
fix problem with escaping backslash
Merge pull request #7 from k-takata/master

fix problem with escaping backslash
add test
Reload only if the content is updated
Merge pull request #8 from k-takata/topic/prevent-reload

Reload only if the content is updated
moved js library
ダブルクオート統一したりロジックに影響しない修正
parse impl of each filetype
add support textile