Merge pull request #910 from fabrixxm/master

quattro: css for reshare moved to LESS file
target="_blank" instead of target="external-link"
api: Improvements for entities
Showing "view full size" is now configurable
API: Support of "include_entities"
API: Better detection of repeated messages. Better handling of tags. (In a next step they will be included in the entities)
API: Retweets with Twidere now work again.
Merge pull request #911 from annando/master

target="_blank" and api improvements
Speeding up showing marked posts.
parse url: Characters like < and > has to be escaped when showing the parsed output.
Only some code beautification.
Vier should now work better on some older browsers
Merge pull request #912 from annando/master

More compatible "Vier", more speed and problems with some parsed characters
RU: Update to the strings
Merge pull request #913 from friendica/20140222

RU: update to the strings
API: Better support of picture links
Support for twitter cards (in both directions)
Vier: Option to switch between shadow style and flat style.
Adding cache mechanism for bbcode. Improving cache to use apc.
Vier: Added config.php