Overloaded get methods to return fallback Option

[bdbenim]

This PR adds overloaded get methods to both Section and Document classes with an additional parameter of type bool called returnOption. If set to True (defaults to False) then any fallback value returned will be a new object of type Option rather than simply the value of the fallback parameter. This option will have the value of the option parameter as its key and the fallback or default parameter as its value.

Of note, this new option will not be attached to any section, which may not be the desired result. I made that choice because I don't believe that the actual config file should be updated to include any default/fallback options if the user decides to save the file later. Rather, these should be explicitly added.

Similarly, a new overloaded get_section method has been added to the Document class which has the same behaviour as described above but for Section objects. Again, these will be created as orphan sections and not attached to the document.

[bdbenim]

I'm not sure why that one test failed. I just tried running it on my machine to make sure and it outputs a length of 14 as the test expects.