Replace factorial function with a compile time one

[ghost]

No description provided.

[ghost]

I think it may be better to generate this table directly in "fac" proc, so if user doesn't use "fac" compiler doesn't create these?

[ghost]

@Araq, @dom96, someone, please review.

[survivorm]

Looks like a sound idea, no improvements coming into mind

[dom96]

This depends on a couple of factors:

• Does this affect compile-time when I am importing math but not using fac?

• When fac is used how much slower is the compilation?

• How much does this affect the binary size?

[ghost]

@dom96 1) I think not but I don't know if this or my previous commit is the right way.
2) none at all. It only creates a table of 21 integers. 3) +168 bytes I guess?

[ghost]

@NotTito sorry, I didn't notice it earlier - why did you remove ability to call fac with 0?

[ghost]

@Yardanico can someone with access fix it, sry I dont have time.