code: better variable names

[armfazh]

it is noisy to get variables named in binary _100 or _101.
Better to follow a standard rule, such as i4 or any other counter in decimal or hex.
or at least, allow the user to specify the format desired.

[mmcloughlin]

Yeah I chose that to match https://briansmith.org/ecc-inversion-addition-chains-01. But yes it's not the best for code generation. I think your request could be covered under #94.

How did you generate code from the output? By hand?

[armfazh]

manually, it was a tedious task.