Added function to get a log level from a case-insensitive string

In general keeping code compact increases readability. Removing superfluous
whitespace at the beginning of code blocks is also part of our style guide.
On Aug 18, 2014 9:51 PM, "uschwes" <notifications@github.com> wrote:

> In sm_logging/test/logTest.cpp:
>
> > @@ -47,3 +47,90 @@ TEST(LoggingTestSuite, testBasic)
> >      }
> >
> >  }
> > +
> > +TEST(LoggingTestSuite, testLevel) {
> > +
>
> What´s the rational behind this? No whitespace why? Or do you mean a
> linebreak before the opening bracket of the test case?
>
> —
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> <https://github.com/ethz-asl/Schweizer-Messer/pull/100/files#r16377584>.
>