Reset margin of .md-header

This is required in order for the header to look ok when using
Bootstrap 3.1.x.
Upgrade to Bootstrap 3.1.1
Add an .editorconfig file to help maintain a consistent coding style
Update doc
Merge pull request #39 from tjormola/fix-md-header

Reset margin of .md-header
Merge pull request #40 from tjormola/bootstrap-3.1.1

Upgrade to Bootstrap 3.1.1
Update compiled css
Bump minor version
Bump minor version
Merge pull request #43 from emagnier/editorconfig

Add an .editorconfig file to help maintain a consistent coding style