Merge branch 'release/0.5.5' into develop
[docs] Update What's New with new image size lib
[docs] What's New update
Fix titles of blogs hosted on WordPress.com
Ignore whitelist wildcard record in API output
[core] add config to disable images size loading
undefined bugfix
[api] cache timouts
[api] support specific cacht ttl (CACHE_TTL_PAGE_TIMEOUT) for pages with timeout
[server] show exception stack trace only in debug mode
[api] fix checking timout error
Replace 'thumbnail' rel with 'image' for URLs with image MIME types

With regards to #31
Tweak Tumblr custom domains parser to cover only posts with titles (and not to conflict with Habrahabr URLs)
[Domains] Explicit Habrahabr.ru parser
[Domains] Update Angel List according the site changes
[Domains] Vevo removed all the tags on their pages :\
[Domains] Gawker Family: gawker.com, deadspin, lifehacker, jezebel, gizmodo, io9
[Domains] Forgot Kotaku & Jalopnik to Gawker family
[Domains] subdomains for entire Gawker family
[iframely-meta] fix aborting connection