See patch at
https://issues.apache.org/jira/browse/INCUBATOR-93
to clarify the acceptance phase of new podlings
because the process depends on who is Sponsor.
The gist of it is:
---------
In Incubation_Policy.xml ...
* Add sentence to distinguish between IPMC being the sponsor or a TLP.
* Move the "Acceptance of Mentors" paragraph to its own sub-section.
In Process_Description.xml ...
* Add an "Introduction" section at beginning to remind to read other documents
which also explain the process.
* Add words to distinguish between IPMC being the sponsor or a TLP.