added iPython dependency info
brctl path
added arpMonitorThread
Initial contribution to an arpMonitor

Needs to read the configuration file for db filename
Needs to be queried…
updates the Instance object (tested)
extra information on dependencies
Merge https://github.com/stroucki/tashi into trunk
Merge branch 'trunk' of https://github.com/dgomes/tashi into trunk. The modifications were already merged when the code was hosted on Apache, so this merge is to clear out the github network difference.