Merge pull request #1 from paul-breen/master

Update from paul
Merge pull request #2 from 52North/master

update from upstream
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
refactor documentation
add license information and code file headers
add license header to css, fix encoding issue in license header
Merge pull request #21 from nuest/new-docs

Update documentation and license information