fixed type hinting of Mailer
Removed isUser()
Create validators.gr.yml

Added Greek translation
Create FOSUserBundle.gr.yml

Added Greek tanslation
Renamed to align with validators.pt.yml

Portuguese of Portugal is the standard portuguese and it's official code is pt.
See: http://en.wikipedia.org/wiki/ISO_639-1
[DX] Extends base controller Symfony class instead of ContainerAware
Update Changelog.md
Update groups.md

With the doctrine xml config
Update groups.md
Update groups.md

remove cascading
Preserve entropy in TokenGenerator

base_convert loses precision on large inputs. Use URL-safe base64_encode instead.
Updated the changelog and the upgrade instructions
Merge branch 'preserve_entropy' into 1.3.x
Cleaning up uses
Merge pull request #1599 from fejese/cleanup-uses

Cleaning up uses
Merge pull request #1554 from waldermort/patch-1

Update Changelog.md
Merge pull request #1515 from Dudytz/master

Renamed to align with validators.pt.yml
Merge pull request #1194 from sstok/patch-3

fixed type hinting of Mailer
Merge pull request #1318 from crash21/master

Added Greek Transaltion
Merge pull request #1575 from lucciano/patch-1

Update groups.md