- Use Vector class derived from Array
- Use Array/Vector.from for initializing/cloning of Array/Vector
- Remove most semi-colon line endings
- More use of arrow functions
- Use Object.assign to copy properties in _malfunc and function
cloning.
- Remove or inline a bunch of types.js functions that don't really
need to be separate functions: _obj_type, _sequential_Q, _symbol,
_symbol_Q, _vector, _vector_Q, _hash_map, _hash_map_Q
- Simplify dependency list in Makefile
- Remove some separate core.js functions by moving them into the
core_ns declaration: _nth, keys, vals, with_meta.
With node 7, babel is mostly just used for translating imports into
CommonJS requires for node.
