includes a number of QoI things to help people write the correct code. I will commit
the testcase for it as the next patch.
The bulk of this patch is moving the stdlib, testsuite and validation testsuite to
the new syntax. I moved a few uses of "as" patterns back to as? expressions in the
stdlib as well.
Swift SVN r27959
We get this for free from DI's support for struct/tuple destruction. Put it through its paces to make sure it works in failable value initializers.
Swift SVN r21460
