Fix #809: Add some tests for Arrays backed by TypedArrays
Merge pull request #813 from gzm0/typed-arrays-test

Fix #809: Add some tests for Arrays backed by TypedArrays
Emit Closure nodes in the compiler instead of Functions.

Follow up on the parent commit, now the compiler emits the
new Closure nodes instead of Functions.
Follow up on #802: fix the behavior of the IR checker for While.

Although the constructor of the While(BooleanLiteral(true), body)
always typechecked itself as NothingType, the IR checker still
required that the body typechecked as NothingType. This commit
fixes this inconsistency.
Merge pull request #816 from sjrd/fix-ir-checker-for-infinite-while

Follow up on #802: fix the behavior of the IR checker for While.
Fix #812: Protect deserialization IR hacks with IR version.
Merge pull request #814 from sjrd/closure-nodes

Replace Function nodes by Closure nodes with explicit captures.
Incremental inliner.