Merge pull request #27 from dlintott/master

Override check_origin and fix test suite
Fix version from 1.0beta2-dev1 to 1.0beta2.dev1
Do not look for vboxwrapper on non Windows platforms.
Force to rebuild the COM cache on Windows (for VirtualBox support).
Check if the VirtualBox COM service is installed on Windows.
VirtualBox support refactoring.
Required VirtualBox wrapper is >= 9.1
Change default port ranges.
Add "enable console" option to VirtualBox VMs (True by default).
Add "start at" option to VirtualBox VMs (adapter start index, 0 by default).
Do not activate sparse memory by default for c1700 and c2600 platforms.
https://github.com/GNS3/dynamips/issues/54
Bump version to 1.0-beta2.
Bump version to 1.0-beta3.dev1.
Base QEMU support.
Qemu integration stage 2, support for ASA and IDS.
Tweaks to support Qemu on Windows.
Bump to version 1.0-beta3.
Bump to version 1.0-beta1.dev1.