Add software version in FSL model

Discussed at: https://github.com/incf-nidash/nidm-results_fsl/issues/3
random field stationarity is True
contrast_variance in_coord_space coordinate_space_id_10
Update examples scripts
new function: compare_graphs
Add example for DesignMatrix
Add example for Data
Add namespaces to each example
scripts callable from command line
Remove namespaces in class examples
new test: Check that terms examples are built using templates