M1 documentation effort heads up

[Andrus Adamchik]

I set out to write some 3.0 docs, so commit list subscribers will see  
a bunch of Confluence notifications. My plan is to restructure the  
docs along the lines of "Cayenne Classic", "Cayenne ROP" and "Cayenne  
JPA". So I started by moving the pieces common to all of them up one  
level [1], and will probably rename the "User Guide" to "Cayenne  
Classic Guide" next.

Andrus

[1] http://cwiki.apache.org/confluence/display/CAYDOC/Documentation