Revert "Module name in source files, #373."

This reverts commit 6ffb3e6376b71573401a191ea921971da0312d65.

Conflicts:
	src/pdefc/compiler.py
	src/pdefc/lang/modules.py
	src/pdefc/parser.py
	src/pdefc/tests/test_compiler.py
	src/pdefc/tests/test_parser.py
Parsing module namespaces, #379.