bug 875349: Build JSON metadata for Documents at rendering time
Merge pull request #1138 from lmorchard/875349-document-json-on-save

bug 875349: Build JSON metadata for Documents at rendering time
Fix bug 867686 - Allow YouTube embedding, change var name
fix bug 880020 - handle diff calls with None
fix bug 880014 - Add fifth param to external doc
Merge pull request #1143 from darkwing/live-sample-880014

fix bug 880014 - Add fifth param to external doc
add just a MPL2 LICENSE file
Merge pull request #1145 from groovecoder/just-LICENSE-file

add just a MPL2 LICENSE file
Merge pull request #1136 from darkwing/youtube-867686

Fix bug 867686 - Allow YouTube embedding
Merge pull request #1142 from groovecoder/revisions-unified-diff-880020

fix bug 880020 - handle diff calls with None