* new route `/edit?url=` intended to be used as an edit button target, which detects the type of post and redirects to the appropriate editing interface
* implemented the edit interface for favorites

closes #69

fixes #42

Twitter changed some XSS security settings which prevents Quill from injecting JS onto the page for the inline "favorite" button. This change makes it open the "favorite" screen in a new window.

* disable facebook liking for now since it was getting complicated
* new page for creating a favorite, can pass in a URL parameter too
* bookmarklet code added to the "favorite" page