Added Turkish language files
Added swedish language support
Add $attributes param to asset function

This commit adds a second parameter $attributes to the following functions:

- AssetMaker::addJs
- AssetMaker::addCss
- AssetMaker::addRss

This is useful when dealing with javascript libraries like require.js, which depend on these HTML attributes to function properly.

It does not break the existing code!
Add further translation files
Updated Backend + System language support

Moved hard-coded text in "backend" and "system" to the language files
(English and Dutch). Affected pages: administrator management,
administrator group management, system updates, system settings, email
settings. Also made some strings more generic for general use (like
"Saving...." instead of "Saving administrator account...")
Minor fixes
Updated CMS language support

Moved hard-coded text in "cms" to the language files (English and
Dutch). And some minor changes.
Merge pull request #85 from emir/master

Added Turkish language files
Merge pull request #96 from pariz/master

Swedish language files for backend, cms and system, as well as one typo if in an english language file
Merge pull request #98 from alxy/patch-1

Add $attributes param to asset function
Minor clean up
Merge pull request #111 from erJasp/master

Moved hard-coded text to language file (backend)
SQLite doesn't like this key name
Merge pull request #113 from marcus-herrmann/master

Added German language files
Add new keys to other languages (needs further translation)
Fixes #125
Fixes icon on exception and error pages
Log these errors
Swedish translations
Fixes broken icon refs