Add option to have a custom 'verification sent'

Instead of just kicking the user back to the homepage after the
verification email has been sent. Fixes unclear behavior and has the
potential to increase usability.
Also redirect to verification sent page on resend
update to match rydurham's feedback
Small routes formating tweaks
Change composer installation instructions
Merge branch 'master' of github.com:rydurham/Sentinel
Translated localization files to German.
Merge pull request #98 from 3spin-dev/localization-german

Translated localization files to German.
Updated CSRF filter - fixes security vulnerability
Change permission checking in User and Group controllers
Update UserController.php

Back to edition after change password
Update GroupFormLaravelValidator.php

It is required that the group name is unique
Merge pull request #101 from alograg/patch-4

Update UserController.php
Merge branch 'master' of git://github.com/wnajar/Sentinel into wnajar-master

Conflicts:
	src/controllers/UserController.php
Merge branch 'wnajar-master'
Merge pull request #102 from alograg/patch-5

Update GroupFormLaravelValidator.php
Merge branch 'master' of github.com:rydurham/Sentinel into upstream
Merge branch 'upstream' into dev-hongaar