Allow customization of g:w3m#history#save_file
Merge pull request #20 from medvid/history_file

Allow customization of g:w3m#history#save_file
- サイトを開いてエラーが出ることがあるので修正
- v:langがjaでも問題内容に修正
Merge pull request #19 from FGtatsuro/vsplit

Fix README for vertical split feature.(Related to #18)
Merge branch 'master' of git://github.com/yuratomo/w3m.vim
remove backup file
fix checkbox element
fix resolve charset.