Ignore leading/trailing whitespace in test/section specs

The leading/trailing whitespace is problematic because of e.g.
`WHEN` macro having preceeding whitespace for alignment, and it is
generally messy.

Credits to Phil who did lot of the original work.

Closes #1708

include/internal/catch_test_spec.cpp

@@ -33,7 +33,7 @@ namespace Catch {
     {}
 
     bool TestSpec::NamePattern::matches( TestCaseInfo const& testCase ) const {
-        return m_wildcardPattern.matches( toLower( testCase.name ) );
+        return m_wildcardPattern.matches( testCase.name );
     }