Merge pull request #1 from goodbest/master

add push for img url feature; add push for one specific device feature;
replaced semicolon with comma and added some curly braces (not really necessary but does not hurt)
Merge branch 'master' of https://github.com/goodbest/pushover-for-chrome into goodbest-master

Conflicts:
	options.js
Merge branch 'goodbest-master'
after successfully saving your user key + api token, contextMenu is
reloaded on the fly
> onRequest is deprecated. Please use runtime.onMessage.
> sendRequest is deprecated. Please use runtime.sendMessage.
Merge pull request #1 from tanelpuhu/master

add modication onMessage reload