Update read-only traversal macros.

Likely should be included in testing...
Pull in community files, not yet used.

The server doesn't appear to crash.
Add Rob's basic instructions into the README.md.
Add a real output line to server.cpp, remove debugging ones.
Start integrating community code.

Doesn't crash.
Call the community update code.  Still doesn't crash.
Community update code appears to work.
Fix USE32BIT.
Move computations around, remove redundancies.

Forgot I already maintained the max size...
Include a "processing time."
For the demo, ignore the community merge history.
Futz with parallelism for the demo...

There's not much meat for the community detection code, so just run the
two kernels in parallel?
Blast old .svn directories.
Support removals, pull in changes and bug fixes from main STINGER.