initial deploy target

Features:
1. ```make html``` now gives a fully usable version of the website under ```build/html``` (you will need to use a local webserver for your browser to properly load things)
2. ```make deploy``` will update the website
3. You can edit the welcome page at ```src/welcome.md```, the table of contents is autogenerated.
4. You can edit the index page at ```src/index.md```.

Current issues:
1. Google analytics needs to be integrated somehow.
2. The epub download link is broken.
3. Small width browsers currently get a slightly bad looking page (mostly looks fine, and is completely functional).