Modified for legacy daysimeters

Modified calcluxcla to handle variable input arguments in order to allow
client to read work on legacy daysimeters.
Added 3 functions

calccs calculates circadian stimulus given CLA; lowpassfilter applies a
low pass, zero phase filter to input; processconstants handles constants
taken from the header file instead of the LRC's server or a local file.
Near complete version

Nearly complete version of readraw. Individual components are
functional, however it has not been tested as a whole.