1. make the program go buildable
2. update os.EINVAL and runtime.Cgocalls()
3. wrap mpz_div_2exp() and mpz_mul_2exp to support both
pre-5.0 and post-5.0 gmp (we really have no reason to
restrict ourselves to gmp 5.0+)
R=golang-dev, remyoudompheng, iant
CC=golang-dev
https://golang.org/cl/5847061
parsing and printing to new syntax.
Use -oldparser to parse the old syntax,
use -oldprinter to print the old syntax.
2) Change default gofmt formatting settings
to use tabs for indentation only and to use
spaces for alignment. This will make the code
alignment insensitive to an editor's tabwidth.
Use -spaces=false to use tabs for alignment.
3) Manually changed src/exp/parser/parser_test.go
so that it doesn't try to parse the parser's
source files using the old syntax (they have
new syntax now).
4) gofmt -w src misc test/bench
1st set of files.
R=rsc
CC=agl, golang-dev, iant, ken2, r
https://golang.org/cl/180047
