Update examples & tests accordingly.

Add name parameter to IdealFIlter::new

Fixed missing inverted() fn.

code cleanup

Various code cleanups.

Add corresponding unit test.
Closes #66

Use OpmResult defined in error module.

Add general OpmResult typedef to error module.

Further code cleanup

code cleanup

This cleans up the example code a little bit.
Fixed detector.export_data.
Generate diagram before performing analysis. If analysis fails,
a diagram is generated anyway.
Update various examples to use the aboe save function.