Page action and some other fixes

Branch: eight04/in-my-pocket:dev-title
Branch: pabuisson/in-my-pocket:master
Merged
Merged pull request
Merged in eight04/in-my-pocket/dev-title (pull request #35)
Merged in eight04/in-my-pocket/dev-title (pull request #35)
I added the page action just like old pocket addon.
Also an option to open random item after read.
I don't know how to use icon font, so I left an "R" in
popup.html
.