Implement change to only lowerCase the Windows drive letter instead of the entire file path

[hansenmc]

Resolves #123

[hansenmc]

Also, noted when running the tests on Windows that several of the tests in LoadModulesTest fail, due to verifyModuleCountWithPattern regex patterns using forward slashes, which are backslashes in Windows paths.

If you wanted them to work cross-platform, may need to adjust the pattern to look for either backslash or forard-slash: e.g. changing verifyModuleCountWithPattern(".*/ext/.*", "Should load every file", 7); to verifyModuleCountWithPattern(".*(/|\\\\)ext(/|\\\\).*", "Should load every file", 7);.

[rjrudin]

Sorry for the delay on this - I tried writing a test for this, but on Mac/Linux, "getRoot" always equals "/". Can you add tests for this - i.e. in a PropertiesModuleManagerTest (you'll want to rebase on dev) - that verify this on Windows? I assume the tests would just pass in Mac/Linux?

I was also wondering if an interface could be extracted here with "getPath()" and "getRoot()" methods. A real impl would be backed by a File. A test impl would be a mock that returns whatever we want. That allows us to test lines 157 through 164.

If you like the above idea, let me know, I'll toss it together and then merge this in.