Move tufte-latex material into main repo

Maintaining the tufte-latex repo as a subtree seems excessive and
unnecessary; we can just drop in the new files as we need them.
Move shared-repository material to this repo

I've move the shared preamble and bibtex database to this repository; while
the projects are under initial development it will be easiest to just
keep them separate.
Move copyright holders into separate AUTHORS.tex file

Obviously not important right now, since I'm the only copyright holder,
but this may be useful later and there's no reason to put it off.
Generate document date automatically

This commit removes the document date and version number from the repo
and generates it on-the-fly from the git repo as necessary.
Add github rss feeds to README

Github provides RSS feeds for commits to any branch on their projects;
this commit adds the URL for those feeds to the README documentation.
Merge remote-tracking branch 'origin/master' into dev

Conflicts:
	README.md
Remove leading 'version' from date

I'm going to start prepending a 'v' to the version tags, so explicitly writing 'version'
when the date displays the version is redundant.  So it's been removed.
Version 0.1.4 (minor changes)

* Updates the makefile to generate date and version information
  automatically with 'make ver'
* Moves material from shared repositories into this repo to free us up
  from worring about interop while we're doing the first real draft.
* Adds some material to the README file (rss feed location)
* Moves the authors into a separate tex file and appendix for convenience