Bug: A keyword in the wrong .ini section should cause the application to fail, it doesn't

[tomvars]

If you put in a keyword which is not valid in ANY of the .ini sections then NiftyNet will fail with an Error message saying "Unknown keywords in config file". However, when a known keyword is used in the incorrect section it should fail and say something like "Keyword in wrong section" but it doesn't.

[mmodat]

@tomvars Want to take this one? 😄