Tidying up 2 examples & removing 2

Ex9 removed as it has non standard <Inside> <Outside> elements
Ex10 removed as
https://github.com/NeuroML/NeuroML2/blob/development/LEMSexamples/LEMS_NML2_Ex10_Q10.xml
is a more complete/better tested version of q10 scaling
These examples are still in jLEMS, but should not (yet) be in these
reference examples