runtime/compiler_helpers: Import ConstList.
runtime/compiler_helpers: Import ConstList.
runtime/data: Implement split() for strings.

I had to cheat on the import statement because of circular imports.
compiler: Quote slot names during slot lookup.

Fixes accesses to slots in certain situations.
src: Split atoi from derp.
runtime/data: Make string slicing work.
src/terml: Add utility function for finding QL holes and parsing them.

Well, "parsing", at least.
test: Fix compiler test.