adding initial draft of code to do turbulence risk and lightning risk plots for overshooting tops; turbulence risk is mostly finished while lightning risk has dummy code where it needs an algorithm to separate the percentages of risk based on brightness temperature; also added date/time information to all ot plots

git-svn-id: https://svn.ssec.wisc.edu/repos/glance/trunk@188 8a9318a1-56ba-4d59-b755-99d26321be01