Front-load MethodFinder's parsing work
Improve MethodFinder spec, so we KNOW we're finding private zombies
Rename ZombieScout::{MethodFinder,Parser}, because it will soon do more
Rename Parser#{find_methods,defined_methods}
Add ZombieScout::Parser#called_methods
Don't grep for methods we already saw called
Stop tracking private method calls, since we're tracking ALL method calls now
Fix warning about top-level reference to ::Parser::AST::Processor
Delete puts-es about how many greps we save by tracking method calls