Version 1.4.0 alpha 4

• Quote command in qemu debug logs so you can copy/paste them
• Support for Qemu disk interfaces, cd/dvd-rom image and boot priority. Fixes #278.
• Check for VMware Player version >= 7 and VMware Workstation >= 11. Fixes #286.
• Catch GeneratorExit exception when trying to create a Ghost IOS image.
• Backport: removes code that deletes IOS router instance files.