Merge pull request #381 from bram85/master

Fix for testing filters getting stuck sometimes.
Added curl CURLOPT_NOBODY option in geturl function to ensure the HEAD method is used when resolving permanent/temporary URL moves.
Added webkit-specific overflow scrolling for iOS devices to allow for inertial scrolling.
Merge pull request #382 from dzaikos/ios-inertial-scrolling

Enable inertial scrolling for iOS devices.
Updated cache_images() to use _MIN_CACHE_IMAGE_SIZE constant when checking file size. New constant is defined upon including rssfuncs.php if not already defined.
Merge pull request #385 from dzaikos/cache-image-size-2

Cache image size (take 2)
scroll to end to show next feed or category
only if cmd_auto_catchup and on_catchup_show_next_feed set
Merge pull request #386 from wolfgangasdf/master

After scrolling over all articles, show next feed or category automatically
mail plugin: only mail unique articles
mailto plugin: only mail unique articles
mail plugin: cleanup disabled completion, add configurable destination email list
mail plugin: destination dropdown css fix
Merge pull request #388 from dzaikos/fix-curl-head-request-method

Fixed geturl() function to ensure HEAD request method is used.
Update schema for size support of enclosures
Store size of enclosure to database
Add width/height attribute to image enclosures
Merge branch 'tribut-enclosure-size'
fix sharebyurl identifying articles by link instead of special synthesized guid which caused feed entries overwriting shared entries if their link matched
rebase translations
release 1.13