Added a failing test case for error method, it just doesn't show the
custom error message when using:

```
error 404 do
  'my 404'
end
```

it does work when using `not_found`
Remove useless skip-test and few refinements
[Admin] Few improvements
Update Twitter Bootstrap
Custom error - I18n these!
Color error's icon :D it's cool :P
fix #1157
Merge pull request #1158 from WaYdotNET/fix-ohm-password-not-confirmed

fix #1157
Update translate with custom title
Refactor errors: i18n  !!!! THX @dariocravero
fixtypo
Merge pull request #1156 from WaYdotNET/final-admin

Custom error - I18n these!
Fix Russian translation. Исправления в русском переводе
Fix translation for ja
Fix typo in admin locale file
Change wording translation for ja
Fix typo in admin ja locale
Merge pull request #1160 from tyabe/fix_admin_locale

Fix admin locale file
FIX: env-shebang typo in padrino-performance.gemspec
Merge pull request #1162 from lenzcom/master

FIX: env-shebang typo in padrino-performance.gemspec