ZF 1.12.7 compatibility fix.

Conflicts:
	README.md
	application/forms/Search.php
Fixed broken link.
Fixed typo.
Use PHPUnit's filter option instead of selecting test class file (allows selecting individual tests).
Fixed preservation of network interfaces of deleted computers.

Conflicts:
	application/controllers/ComputerController.php
Added file access helper class.
Fixed creation of added columns.
New inventory uploader class.
Migrated computer controller.