fix issue #25
add nunjucks template file
Now using nunjucks!

**Broken:**
Main content no longer editable. Need to split input into constiuent
blocks and deal w/ independantly.

**Temp:**
Kit template (public/templates/kit.html) is a temp fix till nunjucks
templates for kits exists in mozilla/webmaker-kits
reduce layout thrashing by debouncing a little
seperated out main content into constituent parts
removing unused files
add option to edit "Additional Resources"
Merge pull request #47 from fuzzyfox/nunjucks

Solve issue #40 - use nunjucks or similar to build preview + kit stub