Completely rewrote import system, lexer, and parser. This version uses ANTLR 4 instead of a custom-built lexer/parser. Now loads files completely before importing any dependencies.
Expanded the use of the wildcard, allowing for more generic rules. Now allow ! at the start or end of a name pattern, to allow for more specific pattern matching. Note: these features have only been added to the grammar, and have not yet been implemented in the backend.
The language is largely complete and usable in its current form. Most of the following development will be testing, debugging, and documentation.