Fix broken link.
Merge pull request #104 from bobthecow/patch-7

Throw linux users a bone
Merge pull request #101 from whatthejeff/patch-1

Fix broken link.
Link to PSR-4
Merge pull request #106 from philsturgeon/patch-6

Link to PSR-4 in FAQ
Update to latest gems, add jekyll-redirect-from
ignore .bundle
Use jekyll-redirect-from plugin, now that we can.

Fixes #107