Reorganize layout

Update to clouddocs-maven-plugin 2.0.2
Also created parent pom.xml file and updated
pom.xml files in v1.0 and v2 dirs to point to parent
Changed directory structure slightly to mimic other
API dir structures.
Added xml:id to sections and chapters in the v1.0
book and the incubation document.
Moved shared graphics to figures directory in
root directory.
Update doc-test.conf for the changes

Change-Id: Iae6dddbe39a536c5c71be5919b28f69e588fea43