Added ability to use pre-shared key or data will be rejected; also ra…

…ndom key generating helper function.

Added logging to a file.

Lots of changes since v0.0.7: check the readme.

JSON export.

v0.0.6, minor addition to disk-persisted file.

v0.0.5: added ability to delete a node's data from Receiver; updated …

…readme.

v0.0.4: more tests, perisistent data, Solaris build/binaries, OS images.

Version 0.0.3. Minor fixes, some additions.

Collects and reports on even more information.

Version 0.0.1.