fixing rVal/MOS calc.

main
- changed headers passed to “All StDev/Mean” function call
- added more headers for rVal/MOS function call (now does west, east,
and total)

STDS
- fixing incrementation of file name when exporting
- updated strings for determining function calls

SpeedTestFile
- TCP_Total_StDev….. now return stdev and MEDIAN, not mean
- calculation of rVal and MOS now has explanatory comments, and works
properly
- - Once all variables created in beginning of function have values,
they are passed to the calculation function in utils
- -
- - Final values are appended to CSV in order (west, east, total)

PingTest
- cast ping times parsed into floats

utils
- created function that calculated rValue and MOS value. returns values
in a tuple
- csvImport and csvExport now correctly remove leading and trailing
whitespace and remove quotations, respectively.