* First cut of python logging in wee_import
Utilities Guide updates to be done separately
* Refactored logging.
Removed class WeeImportLog.
All logging now done directly to module level logger.
Console output now done directly from the module concerned using print function.
* Replaced log method calls with info/debug/error method calls
- log output is now save din the weewx log file not a separate
wee_import log file.
- fixed bug in CSVSource.periodgenerator()
- found (and removed) a few references to now defunct wee_import.conf
- revised comments at top of each method
- moved summuray info output from Source.saveArchive() to Source.run()
- added comments to ImportQC class
- reworked option parser config in wee_import
- fixed issue affecting imports where no records are saved to archive
until 2nd or later periods
- rework various log messages
- now only get a WXCalculate object if we really need one
- fixed issue whereby unit system for no db situation was not returned
correctly
- removed some redundant object naming
- created weewx/bin/weeimport folder and contents
- created weewx/util/import folder and contents
- deleted weewx/wee_import.conf
- updated weewx/bin/wee_import
