need to correct permissions after startup.sh

[CharlesTBetz]

after running startup.sh, non-owners of vagrant will see this on attempting to vagrant up.

need to correct permissions as indicated.

There was an error while executing VBoxManage, a CLI used by Vagrant
for controlling VirtualBox. The command and stderr is shown below.

Command: ["import", "-n", "/var/vagrant/.vagrant.d/boxes/opscode-ubuntu-14.04a/0/virtualbox/box.ovf"]

Stderr: 0%...
Progress state: VBOX_E_FILE_ERROR
VBoxManage: error: Appliance read failed
VBoxManage: error: Could not read OVF file 'box.ovf' (VERR_ACCESS_DENIED)
VBoxManage: error: Details: code VBOX_E_FILE_ERROR (0x80bb0004), component Appliance, interface IAppliance
VBoxManage: error: Context: "int handleImportAppliance(HandlerArg*)" at line 304 of file VBoxManageAppliance.cpp

[CharlesTBetz]

and group

[CharlesTBetz]

note that this is only when running Calavera on a shared server, which introduces various problems. No impact on single workstation use.