Highlighting virtual machines and the links connecting between VM and Vrouter.
Clearing virtual machines and the links connecting between VM and Vrouter while
resetting the topology.
Removed all trailing spaces.
Changed the time range values and position in the underlay overlay search flows tab

Change-Id: I38e43605d4aad00f1fe2533075d89b5cbfe231b3
Adding tooltips for prouters and links
Merge pull request #4 from rajreddy/webui

Highlight/reset VMs.