Merge branch 'release/0.5.1' into develop
[api] /iframely optimization: remove raw-meta request, get meta from debug info from main data request
[api] sort links in rel groups: iframely links goes first
remove links with href==canonical or href==uri of requested page
[domain plugins] fis facebook plugins
[domain plugins] support new instagram embeds
[iframely.js] add link selection helpers
[domain plugins] update pinterest matching regexps
[iframely.js] do not use protocol for api by default; allow find first link from array by rel filter
[Domains] Add missing Site Name for YouTube
Fix docs typos
add Iframely for Gmail as sample app
open street map: parse new url scheme (#hash) and embed urls
parse new Google Maps url scheme (#!data=...)
google maps tests++
[iframely] fix matching domain plugin when url domain can vary
[domain plugins] add test url with # to openstreetmap.org
Merge branch 'panzi-openstreetmap' into develop
[whatsnew] update
google maps diameterToZoom: handle very small diameters (e.g. 0)

otherwise a diameter of 0 returned a zoom value of Infinity