Partial Conversion to Sigil for IL generation
More Sigil conversion, kicking it up several nothces for bug fixes
More sigil conversion
removing old Sigil references
More IL -> Sigil conversion
Even more IL removal
And more
Conversion complete
Moving to Sigil 1.1.4
Moving to Sigil 1.2.1, adding stack assertions for the *one* unconditional branch in the codebase
Moving to 1.2.2 of Sigil