started #28 stock-math, added new .wide-data-tables style for better data table viewing.
continued #28, started fleshing out table foot for .wide-data-table. moving rest of these changes to style-layout branch.
merged stock-math
.wide-data-table styles, changed data order for stock/option show pages.
merged style-layout
started #29 option-math
merged option-math
date chg on stock/show, if else for stock/index exit date
merged style-layout
merged develop.  gross/net calcs for stocks/options, table footer framed and ready for future column calculations.