User function fixes and changes (#56)

* prevented ArgClass Extract from indexing into empty list

* FuncCallClass GetInputs and GetOutputs convenience function for returning strings

* GetProcInputs method returns all properties of ProcInputClass for use with proc stream checking

* Processing stream is only run if Check returns zero, else an error msg is raised

* Changed uses of properties to propnames in ProcInputClass GetProcInputs

* tCCAaux_inx is a list again as variable length parameters are supported

* Standardized tIncMan, mlActAuto in code

* Properly generate the tIncCh matrix if it is not provided

* Include mlActAuto and tIncAuto in PCA motion correction

* recurse updated to work with new function inputs

* mlActMan and mlActAuto both used for wavelet correction

* OD2Conc wavelength restriction removed

* Phase out old GLM for new stim GLM, suppress a line in errchk

* Prevent stim amps getter from crashing on empty data

* Removed registry from PR