Added fn.s to compute second moment to te-datainit
Added local adaptation to te-symbolic.

Also fixes bug which was causing the conditioning level to be ignored for `te-symbolic`.
Changed local adaptation to SimKernel variable.

So now instead of setting the preprocessor symbol `AMOUNT_TO_REDUCE_FROM_FIRST_BINS`, the same is done using the variable `LocalAdaptationAmount` in the SimKernel control file.
Minor changes in te-datainit file.
Renamed constants in simulation file to upper case

...as is standard in Python. Also cleaned up comments.