Runtime overhaul

[Idorobots]

Fixes #16 Closes #56 Fixes #183 Fixes #191 Fixes #192 Fixes #193 Fixes #198 Fixes #200 Technically Closes #170

TODO:

• [x] Fix monitor inlining.
• [x] Fix recv requiring recur to yield execution.
• [x] Make JS codegen handle all of the core.sprtn primops.
• [x] Extract &current-continuation handling to a compilation phase (along with &module, &file, &line, etc).
• [x] Handle declare-primval and declare-primop instead of hardcoded lists in closures.rkt (to be replaced with FFI at some point).
• [x] Decouple Scheme runtime namespace from the actual code namespace.
• [x] Make the decoupled namespace at least as performant as previously.
• [x] Refactor core.sprtn delimited continuation primop handling not to require macros in scope.
• [x] Rewrite the runtime system in Spartan and have the scheme runtime present only a minimal bootstrap.
• [x] Make the JS codegen embed core in the output code.
• [x] Handle delay-milliseconds better in JS runtime.
• [x] Fix kontCounter optimization causing stack overflows in JS runtime.
• [x] Compile the core module during compilation.