Update Rss.php

Add Source-Title to Item-Title in RSS-Feed-Output
fixed misspelled variable
rss feed title is now: "example item title (source title)"
save the last update time of a source, to be able to update not-up-to-date sources at first
Fix: Tags and Sources in Sidebar not clickable after adding/saving source
Fix wrong get last icon sql query
Opening feed search focus the search input field
Scroll blockquotes and pre on overflow (especially good for mobile devices)
fix #143 by removing BOM
new option for automatically mark items as read
readme update
Add r shortcut to reload the current view.
* new share buttons for email and pocket (thanks a lot to Francis Noel)
* replace share icons with black style icons
update docs
update readme
fix bug in database update for postgresql
fix bug in database update for postgresql
remove text from share buttons
improve formating of share buttons
auto mark as read only on showing items not on collapsing