Except for the draconian line length limit (used
--max-line-length=99).

* Don't require same file type for all files.
* Fix bugs in packet handling.
* Properly close files to avoid exhausting file descriptors for large
  numbers of RNSCA flies.

Conflicts:
	setup.py

Replaced the merge code with something less efficient but easier to
grok.

New stream impl that does not read the data that will be used to create
and index used in new merge code.