New Feature: In the VS Code extension, added automatic detection and reporting of accessed local variables, parameters, imports, private methods and private class variables. They appear as "gray" in the editor.
New Feature: Entries defined in NamedTuple or namedtuple now work with the "show definition" feature in VS Code.
New Feature: Added "reportConstantRedefinition" feature, which reports any attempt to redefine a variable that is named in all-caps.
Bug Fix: Fixed code flow analysis bug relating to try/except/else statements.
Bug Fix #123: breakpoint function was being incorrectly excluded from the builtins namespace.