Adds an additional check for the existence of a populated user
reference, when determining if the current user has immediate access to
the requested article.
Without this fix, the server will throw an error if the requested
article doesn't have a populated user field.
Modified the article & articles list view's to check if the article has
a populated user. If not, then it will display "Deleted User" in place
of the missing user reference.
Added a server-side test that ensures we can get a single article if
the article.user field is referencing a deleted user.
Fixes#1082
A state parameter was added for the routes that require user authentication. Now, everytime a statechange occurs, the destination state is checked and user is redirected to signin page if necessary. Note the state parameter is added within `data`, so that nested states can inherent its value.
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.
