Will be useful in optimizing bulk array mutations such as sort()
Also stopped making UnsafeArray a generator; in general making a
collection a generator seems somewhat muddled and dangerous, especially
when it comes to adapters that may have reference semantics.
Swift SVN r18924
Remove all gyb-generated files and generate them automatically from .gyb
files. Rename the proof-of-concept UnsafeArray.swift.gyb back to
UnsafeArray.swift. Never forget to update the .gyb file or regenerate
again!
Swift SVN r14445
Now a "foo.bar.gyb" file in a list of sources gets automatically
processed through gyb to produce "foo.bar"
Renamed a simple .swift file in the stdlib (which needs a rename anyway)
to have a .gyb extension as a proof-of-concept.
To make this useful for our existing gyb files, we need to figure out
how to pass them the right arguments; that's coming next.
Swift SVN r14444
