Wiki page for upcoming 10.2 release

[Rick Hillegas]

Using Andrew's 10.1.3 wiki page as a template, I have created a first 
cut of a wiki page describing the upcoming 10.2 release 
(http://wiki.apache.org/db-derby/TenTwoRelease). Please feel free to 
improve this page. In particular, JIRA-pros may want to review whether 
the pointer to open 10.2 bugs resolves to the correct query.

Now is a good time to vote on and otherwise identify the bugs we want to 
fix in 10.2.

Thanks!
-Rick