The gui now sends heartbeat notifications to the server
GNS-42 - gui heartbeat frequency is now read as a config option
Remove the initial heartbeat notification as it attempts to send it before the connection is live.
Merge pull request #20 from planctechnologies/gns-44

Gns 44 - Send heartbeats from GUI to server
fixed bug on storing instance names into the topology file
do not store server keys upon SSH connections
Merge pull request #21 from planctechnologies/gns-98

Gns 98 - don't store ssh keys in users .ssh/authorized_keys
Merge from dev