Fix issue #349: internet_weather.pl negative temp

Modified regex to look for - sign on temperature
Also corrected some perl warnings
Fix issue #353: KeypadLinc wrong responder d3 value
Merge pull request #350 from mstovenour/fix_issue_349

Fix issue #349: internet_weather.pl negative temp
Merge pull request #354 from mstovenour/fix_issue_353

Fix issue #353: KeypadLinc wrong responder d3 value