add everything vagrant, fixes #21
added version control functionality to documents. Created a reusable diff viewer and also added tests
update vm download link. update concat to fix provisioning on windows hosts. gitignore ".vagrant".
Merge pull request #32 from karyon/vagrant_21

add everything vagrant, fixes #21
fixes #3
refactored editor and version view into new app
editor and diffviewer now fully reusable
Merge pull request #35 from Bartzi/information_pages_versioning

introducing documents with history