Additions and tweaks to expressions docs

 - Add example of conditional section (this wasn't obvious when I first read the docs)
 - Make each example it's own sub heading, to allow people to quickly scan the document.
Merge pull request #25 from mikemaccana/patch-1

Additions and tweaks to expressions docs
Add @cfenzo's minmaxwidth plugin
Add decorators to glossary
Merge pull request #26 from codler/patch-1

Add decorators to glossary
Order by alphabetical
Merge pull request #27 from codler/patch-2

Order by alphabetical
first attempt at a Travis CI auto-deploy script
fixed .travis.yml
chmod deploy script before running
argh
here travis, try this
remember to build BEFORE deploying...
lint yml. (sorry to anyone getting spammed as I try to figure this out...)
more debugging
try using cp instead of grunt copy
added deploy sequence back in
dont deploy from a PR!
innocuous change to test Travis CI deployment to gh-pages
copy recursively. doh