Use png for image.
Added get graph api method
Use port 443
Reseted port to 80
added 'initiate_reload' call
Modified purge module
Updated Purge module
Merge branch 'master' of http://github.com/manishsethi/opsview_rest
Fixed configuration reload using API
Merge branch 'master' of https://github.com/manishsethi/opsview_rest