stop differentiating between different types of sensor, start grouping per device, done for supermicro sensors plus nicer MIB-based rewrite

git-svn-id: http://observium.org/svn/observer/trunk@4319 61d68cd4-352d-0410-923a-c4978735b2b8
clarify device applications tab

git-svn-id: http://observium.org/svn/observer/trunk@4320 61d68cd4-352d-0410-923a-c4978735b2b8