Añado la gestión de errores al servidor de máquinas virtuales.

 On branch issue_38
 Changes to be committed:

	deleted:    src/CygnusCloud/ccutils/compression/VMServer_settings.conf
	modified:   src/CygnusCloud/ccutils/compression/zipBasedCompressor.py
	modified:   src/CygnusCloud/testing/virtualMachineServerTester.py
	modified:   src/CygnusCloud/virtualMachineServer/networking/packets.py
	modified:   src/CygnusCloud/virtualMachineServer/reactor/vmServerReactor.py
	modified:   src/CygnusCloud/virtualMachineServer/threads/compressionThread.py
	modified:   src/CygnusCloud/virtualMachineServer/threads/fileTransferThread.py