Release v1.2.0

Merge branch 'feature_modules'

Fix documentation server

Make module api public

Remove errno hack

Rename errno to err_num

Allow importing other lisp files

Make example module into OS module

Implement global module registry for builtins

Add tag generation to Makefile

Implement syntax sugar for getattr

Add stub import and getattr builtins

Signed-off-by: Stephen Brennan <stephen@brennan.io>

Add module type

Signed-off-by: Stephen Brennan <stephen@brennan.io>

Implement "array" iterators.

Array iterators are necessary for implementing most container objects,
so they can simply return a list of all contained items when they are
expanded by the garbage collector.

Signed-off-by: Stephen Brennan <stephen@brennan.io>

Add let to changelog

Update docs

Implement the let builtin

Merge branch 'master' of gh:brenns10/funlisp

Update changelog with versioning

More correct quoting tests

Fix bug in macro argument evaluation