* Filesystem:
  * Implement List() on Windows
  * Tests for T_FSPath
  * Tests for Filesystem
* VFS
  * Tests
* Tests for T_ArrayHelpers
* Generalize iterators
  * Hash tables
  * Sets
  * Strings
  * Tests for T_StaticArray
  * Tests for T_AutoArray
  * Tests for sets
  * Tests for hash tables
  * Tests for strings
* Reimplement threading so it avoids yet another DLL on windows