Merge branch 'release/0.5.3' into develop
[doc] better wording for domains db
[domains] Polldaddy added
[api] better performance on /supported-plugins-re.json
Add link to github
Proof-read the docs
More docs proof-reading
3rd round of proof-reading
try to fix formatting error
Added supported-plugins-re.json into doc
Replace standard x-powered-by of Express
[domains] Adjust Twitter regexp to work only with statues and photos

Otherwise we get way too many 34 errors.
[generic plugins] permanently cache readability response
[generic plugin] allow use oembed link reader for proper whitelist record
[api] cache all api requests
Merge branch 'response-cache' into develop
[whatsnew] updated
[Domains] myvideo.de does not require max-width any longer
[Domains] Fix Angel List - they don't have OG anymore
[Domains] TechCrunch launched new site design. Fixed the plugin