Changed some bad comments referencing the Articles module in other modules.
Typo fixed in xxx.client.modules.js files ("Application" => "Applicaion")
Full stop character removed at the end of line comments
Two different strategies are adopted, one for when the user authenticates locally and the other through providers. When authenticating locally, the signin function in the client controller redirects to the previous state (storing and using a state name) after successful login. When authenticating through a provider, the first call to provider stores the previous URL (not state, URL) in the session. Then, when provider actually calls the authentication callback, session redirect_to path is used for redirecting user.
Emails are made unique. When user attempts to sign in through a provider in which his email is one that is already registered, user is redirected to the signin page with an error passed as a query string parameter.
The executable bit is set for a lot of files where it is not necessary
to have the executable bit set. This PR removes the executable bit from
those files.
