Asset switcheroo

* Vendor bootstrap and font-awesome
* add single custom css
* remove old bootstrap, prettify, other
Looks like there were Gemfile changes, but the lock was never committed.
Remove unused config
lsi is unsupported afaik in github pages
Consolidate redundant layouts
Modularize default layout
Home page layout

* Also removes superfluous meeting ideas file. See _rfp.html
Remove meta-posts in (todo: add to github wiki)
Move Presentations and Meetings sections into dirs

Since jekyll builds everything into a "public" dir, we can store
content in these sections.
Should we have a resources section? Removing until we collect some.
Rename and format posts
Merge pull request #6 from bak/bootstrapify

Bootstrapify, tidy things up