Adding refreshInterval to widget 'val str img src'
Adding 3 new widgets for camera:
* tplValMfdCamSnapshot
* tplValMfdCamMjpeg
*tplValMfdCamVideo

They are different to the orginal one if they are using an hm_id instead of an url. The hm_id contains the url and could come from a rule or adpater.
Merge pull request #100 from thorque/master

Adding refreshInterval to widget 'val str img src'