[gh-396] Documentation and cleanup
[gh-396] Allow aliases to be viewed on a per-site basis & cleanup

Also includes a bunch of cleanup (using vars properly in t(), removing unnecessary fieldsets, etc)
[gh-396] Add site delete checkbox confirmation
[gh-396] On aliases management page show site_path rather than full url
[gh-396] Add ability to edit default site path

Create a new alias with (new) status code 6. Then when cron runs switch the new alias and the default site path.
[gh-396] Validate new alias path to not be parent or sub dir.

Prevent alias paths from being parent or sub directories of the current path.

For example, if you have a site x/y and you create an alias to it: 'x',
then that new alias  works but now the default path x/y returns a 404
[gh-396] Coding standards: Update to Drupal capitalization standard.
[gh-396] Don't allow alias to be deleted that is part of site update.

If an alias has an installed id of 6, which means it is going to replace the current
default path, disable the checkbox as a safeguard to prevent any weird stuff when cron runs.
[gh-396] Reject a site path if it is already in use as an alias
Merge pull request #412 from erasmussen2/issue-396

Issue 396 Pull Request