adding adapter and p2phandshake from WebRTC P2P demo
reverted to unedited version of example file
Merge branch 'master' of https://github.com/bchu/nodetron into jseip1679
added comments and tweaks to sample code
added step-by-step WebRTC handshake comments
Merge branch 'master' of https://github.com/bchu/nodetron into jseip1679
Concurrent client gruntfile
Fixed keyPath bug

Typo with keyPath vs keyPaths
objectStore.put takes two arguments - value and key.
If you already specified the keyPath, no need to specify key.
Otherwise, key takes a value that serves as a unique ID, NOT the name
of one of the object's properties.
For example, key could be "falsjdf5509s", but not "uuid"
Added debug code, comments