Added strings to securesocial.conf in demos

Added some configuration strings to the demos.

onStartSignUpGoTo=/login
onSignUpGoTo=/login
onStartResetPasswordGoTo=/login
onResetPasswordGoTo=/login

This allows users to know how to make custom login
flows without having to dive into the source code.
Merge pull request #1 from alanrodas/demo-updates

Added strings to securesocial.conf in demos
Moved the TemplatesPlugin reference to controllers

All the available references to the TemplatePlugin have been
moved to the controllers package. That way, you can create
your custom TemplatePlugin by just extending Plugin, and
redefining all the controllers.
This forces me to add a UsernamePasswordProviderTemplates
in the UsernamePasswordProvider as it need to retrieve
the login form and the login page in order to work
transparently from the controllers, like the other providers.
Added conf parameters to RoutesHelper

Added a set of configuration parameters definition
and handling into RoutesHelper so you can modify
the default routes provider.
This allows for using some controllers but being able
to define some others, without breaking the code.
Merge branch 'move-templates' of github.com:alanrodas/securesocial into move-templates

Conflicts:
	module-code/app/securesocial/controllers/PasswordChange.scala