Xively UI modifications

Change sample-app -> Power switch
Led color is replaced by power switch state

Problem: Need Xively cloud UI for power switch
Tests Done: tested that power switch state can be changed from UI
Jira: None
Reviewer: Kedar

Signed-off-by: Hrishikesh Dhayagude <dhrishi@marvell.com>
Merge pull request #3 from dhrishi/gh-pages

Xively UI modifications