Main routine: converttemp.m --creates figure
and UIcontrols
Radio buttons: Tradio.m --call back for radio
buttons
Edit windows: Tedit.m --callback for edit windows,
calls Tconvert
Sliders: Tslide.m --callback for sliders, calls
Tconvert
Temp. conversion: Tconvert.m --performs appropraite
conversions & updates objects