beta5

adds:
* you can easily change your theme in your config screen.
* you can poche a link without bookmarklet and extensions: there is a simple field on config view.
* scroll position is now saved. When you return on an article, the last scroll position is retained.
* add warning message when there is no entry in current view
* add number of results next to pager
* flattr icon on flattrable articles.

bugs:
* wrong title on favorites and archives pages
* content was empty when enabling downloading pictures
* titles with colon bad parsed

changes: 
 * remove on login and home views useless link "back to home"
 * display sort links only if there is at least 2 articles in current list
 * locale files updated