Check white-space rules as part of Travis CI build

[kevinrushforth]

This is a fix for issue #108

[muralibilla]

@kevinrushforth, is this comment intentional?

[kevinrushforth]

Yes. I am testing the white-space checker (that particular line will fail because it has trailing white-space).

Note the "Experiment" label, meaning I am just running some tests.

[muralibilla]

I missed the label....Thanks @kevinrushforth ..

[kevinrushforth]

@brcolow you might also want to take a look at this one.

[brcolow]

Very nice. Might take a stab at trying to do the same thing on Appveyor based on your work here. LGTM.

[kevinrushforth]

I don't know that there is much value in duplicating this for the Windows build, since it would just be scanning the same set of source files. If you do want to look at doing that, you might need to skip the -x option to checkWhiteSpace since that is unreliable on Windows (it works on some versions and gives false positives on others, so we typically don't do the check for executable files on Windows).

[kevinrushforth]

@muralibilla @tiainen @johanvos Can one of you review this when you get a chance?