Moved detection and parsing function for 'sensors' and 'hddtemp' to a
separate file used by both 'prefs.js' and 'extension.js'.
Added hddtemp sensors in 'Show in panel' combobox setting.
Merge pull request #62 from Farsx/master

Added hddtemp sensors in 'Show in panel' combobox setting

Closes #60
Closes #62