Fix assignments of registers for jumps
Fix alignment of items on stack in codegen, disable scheduler, and add a few more tests.
Fix a bug in the conflict analyzer for variables that were assigned but not used.
Don't override must-color registers for variables on the stack.
Don't clobber callee-saved registers when doing a function call.
Do not ignore signedness in binary operations involving constants.
Include test_printf.mb in the test run.
Get everything to compile with current rust.
Change the debug spew in printf to be routed through a macro.
Silence the debug spew in printf.
Call the right typechecking function from the failing unit tests.
Updates for latest rustc