First working version of separateClassLogs.py, which will sort out by
class the log entries in a given directory. This version uses the class
name in the context field of the log entry; this is slower but more
accurate.
Partial pass at selectLogRange.py, that will get rid of all logs other
than those in a specified date range. Also a first try at
deleteUnchangedFiles, that gets rid of any files that haven't changed
from those in a prior release. The deleteUnchanged still needs some
work.