Invalidate RLocks cache entries after each new commit
Clear nodeSet after sending invalidation messages
Modified locks granularity to smallest possible scope
Added a polling mechanism that check if the vnode is the current lock manager - Incomplete. Fixing Join protocol for rings created with one vnode
Merge branch 'master' of https://github.com/narendran/go-chord
Changes for enabling join to single node rings
Fixed Invalidation bug when LManager and LManagerClient were the same node
Merge branch 'master' of https://github.com/narendran/go-chord.

Conflicts:
	lm_server.go