Added a regex for the return values of temperature and humidity so that any included text is stripped.

Also tested to make sure the that the default SNMP community is used if not given.  May have worked before, but had never tested it.

#329

Fixes #323
Just a redraw annoyance
Merge branch 'master' of https://github.com/samilliken/openDCIM
Have update every occurrence of SNMP calls to use the default SNMPCommunity if an object local one has not been defined.

Fixes #329
Merge remote-tracking branch 'upstream/master'