Add new translations for Bulgarian.
Add resend_unlock_instructions to locales

- en.yml
- en-GB.yml
Merge pull request #3389 from kmayer/add-resend-unlock-instructions

Add resend_unlock_instructions to locales
Merge pull request #3386 from tsikov/bg-locale

Add new keys for the Bulgarian translation.
Update zh-TW.yml
Merge pull request #3394 from Neson/fix-zh-TW-translations

Update zh-TW.yml
add generator active_admin:page
remove autoload for `ActiveAdmin::Reloader`

The file `active_admin/reloader` doesn't exists
fix empty site_title case
at the moment `site_title=nil` produce `Dashboard | `, but should be `Dashboard`
Bump to latest rails 4.1.x in travis.yml
Merge pull request #3398 from timoschilling/site_title

fix empty site_title case
Merge pull request #3401 from strivedi183/bump_rails_4_1_x_to_latest

Bump to latest rails 4.1.x in travis.yml
Merge pull request #3397 from timoschilling/patch-1

remove autoload for `ActiveAdmin::Reloader`
Merge pull request #3396 from timoschilling/page_generator

add generator active_admin:page