UML class diagram and update using google script
component -> element
Merge pull request #58 from cmaumet/specificationFromGoogleScriptAndUML

Pretty sure this is OK to merge...
Add missing UML class diagram
Update table display (as in PROV-DM spec)
Consistency with terms: "atCoordinateSpace"

Replace "coordinateSpace" attribute by "atCoordinateSPace" for
consistency with the terms sheet.
Consistency with spec: "CustomMask"
Consistency with spec: "SearchSpaceMap"
Consistency with spec: "SubVolumeMap"
Update terms and attributes and overview
Update overview and introduction + auto sections
Merge pull request #59 from cmaumet/termUpdatesForSpec

Merge: (minor) term updates for consistency with terms and specification
mrg: attribute names for mask maps