Merge pull request #6 from tyom/develop

Improved combined pixel/flex usage. Bug fixes.
Added Middleman Deploy for quick deployment.
Added link to Middleman site
Merge branch 'master' of github.com:tyom/bedrock
Fixed issue #7: Flexible grid row has pixel margins.
Moved grid-debug stuff to its own file. Updated README.
Updated Docs.
Copy tweaks
Updated Middleman version.
Merge branch 'master' of github.com:tyom/bedrock
Updated Gemfile.lock
Reverted to Middleman 3.0.2 as 3.0.4 breaks Livereload's web sockets.
Fixed grid-debug.
Attempt to improve flexible grid guides.
Only float last column right when there are more columns in the row
Added simple navigation partial & helper.
Place :livereload in development
Updated title
Fixed .end specificity
Added negative column offsets.