removed dox(x) documentation
fix automatic register blacklisting
comment-out some debugging prints
descriptors.py: Clarify use of negative values

The negative behavior is not obvious, document it in the descriptors.py file
such that people who edit it to add new devices know how it works.
Merge pull request #39 from Lekensteyn/doc-updates

descriptors.py: Clarify use of negative values
comment-out descriptor settings for Anywhere MX, not actually tested
disable info label while we're still reading the info from the device
Merge remote-tracking branch 'origin/master'