Remove cyclic dependencies in symbolic module

See merge request !49

The problem is that in 1D faces are 0D and so carry exactly no
useful information about which side of the element they may be
on.

To hack around that, this commit introduces a hacky operator
that hacks it. Less ambiguously, we just use the connection to
figure out which face we're on on set the normal to `+1` or `-1`
based on that

bind(): Fix bitrot associated with debug_flags

See merge request !47

Track leap Method->MethodBuilder change

See merge request !46

dagrt-fusion.py: Ensure output files get closed

See merge request !45

Changes to make automated reproducibility easier

See merge request !43

Fix some pymbolic/loopy usage deprecations

See merge request !44

Function registry: set loopy language version

See merge request !42

Study of dagrt time integrator fusion impact on memory traffic

See merge request !38

instructions are caught