CKDoc add option to disable alphabetical sorting

[AndrewAday]

CKDoc always sorts the member functions documentation of a class alphabetically. This is disadvantageous for large classes with many variables / functions that are better grouped semantically.

Option could look like:

CKDoc doc;
doc.sortAlphaNumeric(false);

[gewang]

PR merged 15e334392005e5f43453eaeaeb92cfbfcc8248ed

CKDoc doc;
doc.sort( false );