Adding field papers editor; solves #285

Read issue #285. I added a menu item in the editor template and added the proper link template to pull up a given tile area on Field Papers; right now, I can't determine the correct link queries to control the actual size of the square on Field Papers, but it's at least in the correct area and on the right zoom. Sorry this has 4 commits...still getting used to Github and used the master for a first issue, so commit 9e309c2 was that edit and 459ce94 was the reversion commit.