Add assertion in IVirtualBox constructor to check the system's running VirtualBox is the same version as the virtualbox source base used to build virtualbox.library.  Also add option to turn off assertion by setting vbox.VirtualBox.assert_version = False.
Add assertion in IVirtualBox constructor to check the system's running VirtualBox is the same version as the virtualbox source base used to build virtualbox.library.  Also add option to turn off assertion by setting vbox.VirtualBox.assert_version = False.

mjdorma/pyvbox