featureCompiler: rename methods, deprecate old method names, move parseLayoutFeatures
featureCompiler: rename methods, deprecate old method names, move parseLayoutFeatures

I renamed `setupFile_features` to `setupFeatures`, and `setupFile_tables`
to `buildTables`.
The old method names still work, but will fire a deprecation warning.
I was alwyas bugged by the camelCase + underscore, and also, we are not
actually setting up any files. The names come from ufo2fdk.
Time to rename them.

jamesgk/ufo2fdk,googlefonts/ufo2ft,googlei18n/ufo2ft,jamesgk/ufo2ft,moyogo/ufo2ft