Placate flake8 re: usage of ell

See merge request inducer/loopy!173

Preamble with codegen

See merge request inducer/loopy!167

Fix for multi nested if fors

See merge request inducer/loopy!170

only pop if predicates if we are within the same inames (i.e. this insn't the end of a for loop inside of an if

Fix TempVar.update_persistent_hashh to inlcude scope, base_storage and aliasing attributes

See merge request !169

Use kernel assumptions static_max_of_pw_aff for grid size finding

Closes #46

See merge request inducer/loopy!166

Make printed kernels more like input language

See merge request !165

Rename Parallel->ConcurrentTag, introduce InOrderSequentialTag

See merge request inducer/loopy!164

Check that no new inames are added to instructions by ILP realization

See merge request inducer/loopy!162

project out local-id-mapped inames before domain comparison for barriers; solves #94 on gitlab

See merge request !159

Make sure Barvinok-based count() returns a PwQPolynomial of the right space

See merge request inducer/loopy!161