Fixing error in a number of example files, base component type was still abstractCell (not the
updated baseCell; "base" is now used for all non instantiable comp types, baseSynapse, etc.)
e.g. <abstractCell id="passiveCell" type="pointCellCondBased" ...>
This did not give an error in jLEMS or pyLEMS so these examples ran correctly.
Added issue here to check for this in jLEMS: https://github.com/LEMS/jLEMS/issues/30