fix(config): site.baseurl default value is root.

When adding additional pages to the site, the css links can get
messed up until you go back and set a `baseurl` entry in the config.

This makes sense to add this since the project comes with entries for
`baseurl` at the beginning.
port in latest poole changes, update rems to ems
Merge pull request #48 from Droogans/site.baseurl-default-value

fix(config): site.baseurl default value is root.
Merge branch 'master' of https://github.com/poole/lanyon
revert #36 because github pages doesn't use jekyll 2 yet
fixes #44 scope syntax changes to .highlight by pulling in latest poole changes
fixes #8: new icons
ensure IE is running in latest rendering mode
adds new .sidebar-overlay modifier class for keeping the drawer over the content when toggled
fixes #42: add js from @hnrch02 to toggle the sidebar closed when clicking on white space