refactor ftface_props example

[twmr]

BTW this fixes many pep8 errors in this file

[tacaswell]

Not a huge fan of this change, I think it hides the bit-shift logic under a bit too much clever.

[mdboom]

Haven't looked at this file in a while. Note that these constants are now defined in the ft2font extension itself, so there's no need to recreate their values here. i.e., one can just do ft2font.SCALABLE.

[twmr]

@mdboom just found a typo in the values of the style identifiers in ft2font.cpp

What do you think about my last commit. Is it still too clever?

[tacaswell]

@thisch This needs a re-base

@mdboom Can you comment on the ft2font typo?

[twmr]

rebased

[mdboom]

Thanks. The typo fixed here is legit. Thanks for catching.

I think the latest version of the example file here is much better, and not "too clever". 👍 from me.