finding out the prob with numOfTrues part 1
numOfSignalFamilies

Added several changes such as numOfSignalFamilies

found about the diff between size, and familySize - num of PVals against
num of xbars...
fixes to the Overall power calc

and changes to the powercalc function (now gets only length and not the
reject vector)
overall power calc now uses the function and not a special calculation
familySize changed to numOfGroups

after talk with marina
fixed? Power

by noticing that numOfFalseH0s (changed in calcPower)
is supposed to be 380 and not 370
added Method 4 (BH BH)