First version of flow mobility extensions.
In this version the software can manage a userspace queue with the packets to the MN's.
This packets are categorized in flows and a flow identification is saved in the flow mb cache.
Added libnetfilter dependency to configure.ac
Now the conf dump function prints the Userspace queue id.
The VT options VT_DEFAULT_HOSTNAME and VT_DEFAULT_SERVICE can be overriden in conf file.
With the option VTHostname and VTService, both are Strings