Added flag views argument handler.
FieldDefinition is now BaseFieldDefinition
Convert to field_ui_base_route, remove no longer existing bundle keys
Update redirects and other form_state changes
Merge pull request #57 from md-systems/base-field-definition

#57 by Berdir: FieldDefinition is now BaseFieldDefinition
Fixed code style issues in flag.views.inc
Fixed code style issues in flag.api.php.
Fixed code style issues in flag.tpl.php
Fixed code style issues in flag.tokens.inc.
Fixed code style issues in flag.js.
Fixed code style issues in flag.views.inc.