adds org file and gen HTML for HOFs section

	new file:   slides/hofs.html
	new file:   slides/hofs.org
adds slides for HOFs

	modified:   slides/index.html
adds mocha and test for reject

	new file:   exercises/HOFs/hofs.js
	new file:   exercises/HOFs/index.html
	new file:   exercises/HOFs/test.hofs.js
	new file:   exercises/lib/chai.js
new file:   exercises/lib/lodash.js
	new file:   exercises/mocha
adds `every`

	modified:   exercises/HOFs/hofs.js
	modified:   exercises/HOFs/test.hofs.js
adds `mapValues`

	modified:   exercises/HOFs/hofs.js
	modified:   exercises/HOFs/test.hofs.js
adds `findKey`

	modified:   exercises/HOFs/hofs.js
	modified:   exercises/HOFs/test.hofs.js
bit of hierarchy

	modified:   exercises/HOFs/test.hofs.js
full stop!? *twitch*

	modified:   slides/index.html
typo

	modified:   index.html
Merge branch 'master' into hofs

Conflicts:
	slides/index.html

	new file:   assets/promises.ai
	modified:   index.html
	new file:   js/d3.js
	modified:   slides-theme/style.css
	new file:   slides-theme/talk-specific.css
	deleted:    style.css
Merge pull request #1 from funjsldn/hofs

includes HOF section
moved org files into seperate dir

	deleted:    hofs.html
	renamed:    hofs.org -> org/hofs.org
first slides and a bit of lambda calculus!

	new file:   slides/img/church.jpg
	new file:   slides/img/curry.jpg
	new file:   slides/img/lambda.png
	modified:   slides/index.html
	new file:   slides/org/combinators.org
	modified:   slides/slides-theme/style.css
adds more LC, maybe, pulls code to fullwidth

	modified:   slides/index.html
	modified:   slides/slides-theme/style.css
finish maybe section, beginning d3 section

	modified:   slides/index.html
stripped back d3 section, added _ section

	modified:   slides/index.html
adds _ combinators + bit about composition

	new file:   slides/img/composition.png
	modified:   slides/index.html
	modified:   slides/slides-theme/style.css
typos, slide demoing LC level of abstraction vs Turing

	new file:   slides/img/computation.png
	modified:   slides/index.html
note on expressitivity

	modified:   slides/index.html
Merge pull request #2 from funjsldn/combinators

adds combinators minus d3