admin: Remove quota page

Also do a minor refactor of the code that produces the navigation bar.

Fix apyrgio/synnefo#69
Merge branch 'feature-admin-remove-base-quotas' into feature-admin
admin: Restore quota details
admin: Add details page for networks

Show in the details page of networks the following association lists:

* VMs
* Network Interfaces
* IP Addresses
* Owner
* Project
admin: Update VM details page

Add the following associated items in the VM details page:

* Users
* Projects
* Volumes
* Networks
* Network Interfaces
* IP Addresses
admin: Update users' details page

The details page of users now include the following associations:
* Quotas
* Projects
* Virtual Machines
* Volumes
* Networks
* Network Interfaces
* IP Addresses
admin: Add volume and IP details pages
admin: Update details page of projects

The project details page is updated mainly to show all Cyclades
resources that directly derive from a project.
Merge branch 'feature-admin-extra-details' into feature-admin

Fix apyrgio/synnefo#73 and fix apyrgio/synnefo#57.
admin: Show project quota details in lists/details

Add quota information for all project types in all project pages.

In list pages, the summary of a project will have the following lines:
* **Member resource limits** (not for base projects): The limits on
  resources for each member.
* **Total resource limits:** The resource limits that apply to a project
  as a whole.
* **Total resource usage:** The portion of currently used resources.

The above lines are also shown in the details page of a project, under
the "Resources" tab, albeit with a slightly different naming.
Merge branch 'feature-admin-show-quotas' into feature-admin

Fix apyrgio/synnefo#70
admin: Add links to details page in item name

Add a link to the detail page of each item that is shown in a details
view.

Fix apyrgio/synnefo#31
Merge branch 'feature-admin-urls' into feature-admin
admin-ui: General style modifications
admin-ui: Update style of filters
admin-ui: Modify dropdowns
admin-ui: Update style of filters
admin-ui: Update text filters functionality

They update the contents of the table while the user is typing.
admin-ui: Enhance functionality of dropdown filters