Release Version 0.2.7

rc.virtualbox
* Changed multiple VMs start and savestate functions - log each
start/stop.
* Added to virtualbox_download() function: server ONLINE testing, kernel
version testing, fixed logger remarks.
* Added to virtualbox_install() function: If local and installed
versions are the same - skip re-installation
* Added to virtualbox_start_vms() function: If any VMs are already
running - skip starting of any VMs

virtualbox.php
* fine-tuning HTML Status and Actions: versions table, "Available
Version Actions", "Available Control Actions"
* Change Available and Running Status and Actions layout - Changed to
single table
Colours: GREEN, ORANGE

Available         Running      Action      Previous Session
---------         -------      ------      ----------------
Available VM #1     V/X      Save/Start           V/X

* Moved "Apply" and "Done" buttons to Configuration header and changed
to "Save Configuration" and "Return to unRAID settings page"