Updating lems examples to latest from https://github.com/LEMS/LEMS

Using latest location of nml2 lems examples, NeuroML2/LEMSexamples
Incrementing development branch to v0.3.6
Merge branch 'master' into development
Copying latest lems examples from https://github.com/LEMS/LEMS
Updated to latest examples from LEMS/LEMS repo

Throwing an error if example with KineticScheme is used
Raise exception if KineticScheme element is instantiated, rather than defined

Test with standard NML2 example
More examples being tested
Correcting path
Use development repo
Adding dir for sim results
Disabling tests giving errors on Python 3
Disabling long running tests
Ensuring preferred form of !=, .neq. is recognised in expressions in LEMS

Update version num
Adding references
Update README.md