v1.7.6

-- Added unit test for SNIRF processing stream, so now there are 2 big Unit tests one for NIRS one for SNIRF. 
-- Added global variables setting the proc stream config file name rather than getting it from another config file. 
-- Fixed unit test error and bugs, specifically refined how to calculate precision for comparing homer2 and homer3 output as relative to the range of the true data (ie, homer2 data). 
-- Improve unit test print messages.
-- Added better debug code to ProcResultClass Calc method , to print out the actual values of the function parameter at the time of the function call.