[gsac] Allow digits 1-9 as identifier components

Ignore-this: 98a958a9a33eebb69057605d99819689

darcs-hash:20130512022829-2809a-7bdace68d6da4eb74ab21383540423c6b75f1054
[gsac] Allow type arguments to type in .fkargs

Ignore-this: 35cbae4623de468dec1237919c8e0237

darcs-hash:20130512023408-2809a-f1d0a18cd8ebdadb5abf3a89d0bb13d627939b86
[gsac] Allow .alloc in expressions

Ignore-this: a3272f48183d50c60855f6245d42153d

darcs-hash:20130512035339-2809a-a0bfa96b1b2ce226f2652461f96b30f8bae0f232
[gsac] Allow arguments to be omitted in a .apply (despite how silly that is)

Ignore-this: 32ddd7f6cda4e0e85b66c15b146f8ac2

darcs-hash:20130512040439-2809a-4eebff39e584609d340b58d04502ac33d19cc692