generalised 'tab' to 'actor' support webapps
update package.json to support webapps in firefox-client
adding link to fx-ports link
if no tabs or no apps are open, throw error
Merge pull request #3 from nicola/patch-1

Adding link to fx-ports in README.md
removing extra lines, actor to page
deleting extra space
Merge branch 'webapps'
version to v0.1.0