Automake manual section 13 What Gets Cleaned says that make maintainer-clean
should not remove files necessary for subsequent runs of ./configure.

It practically means that all usage of MAINTAINERCLEANFILES were incorrect
so I've removed them.

https://fedorahosted.org/freeipa/ticket/6418

Reviewed-By: Lukas Slebodnik <lslebodn@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>

Support for forms based authentication was added to UI.

It consist of:

1) new login page
Page url is [ipa server]/ipa/ui/login.html

Page contains a login form. For authentication it sends ajax request at [ipa server]/session/json/login_password. If authentication is successfull page is redirected to [ipa server]/ipa/ui if it fails from whatever reason a message is shown.

2) new enhanced error dialog - authorization_dialog.

This dialog is displayed when user is not authorized to perform action - usually when ticket and session expires.
It is a standard error dialog which shows kerberos ticket related error message and newly offers (as a link) to use form based authentication. If user click on the link, the dialog content and buttons switch to login dialog which has same functionality as 'new login page'. User is able to return back to the error message by clicking on a back button.

login.html uses same css styles as migration page -> ipa-migration.css was merged into ipa.css.

https://fedorahosted.org/freeipa/ticket/2450

modifying the directories so they find the assets in the right locations