AngularJS: implement jquery flot

Change-Id: I3e83ae62eac50b47d7d91852a02bdf95213deca9
Reviewed-on: http://review.couchbase.org/40881
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>