<CouchbaseLite.h> should import “CBLDatabaseChange.h”
Don’t use MYReportException in CBLRouter.m

Reverts part of 6479c5813c1b; this broke the Release
build of CouchbaseLiteListener on Mac OS.
Updated .exp file

* Export CBLDatabaseChange class
* Export CBLGeoCoordsStringToRect
* Reorganized the file to make it clearer what’s public