add syndication reload button to the settings screen

* adds setting to choose the property to use for the syndication targets
* all existing users default to the old value `syndicate-to`
* new users default to `mp-syndicate-to`

closes #66

* shows reply context of the URL you're replying to
* autocomplete nicknames from the post when replying
* moved debug info to the settings screen to clean up the UI

* 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

* Supports a bookmarklet to create "like" posts.
* Beginning a "settings" page to connect silo profiles for POSSEing likes to twitter, facebook and instagram