Incompatible with go 1 release

[lamvak]

Cannot compile. Complains about os.Error, but cannot say if that's the only issue, for it fails with "too many errors".
go get launchpad.net/gommap gives:

# launchpad.net/gommap
/usr/share/go/src/pkg/launchpad.net/gommap/gommap.go:31: undefined: os.Error
/usr/share/go/src/pkg/launchpad.net/gommap/gommap.go:40: undefined: os.Error
/usr/share/go/src/pkg/launchpad.net/gommap/gommap.go:51: undefined: os.Error
/usr/share/go/src/pkg/launchpad.net/gommap/gommap.go:78: undefined: os.Error
/usr/share/go/src/pkg/launchpad.net/gommap/gommap.go:93: undefined: os.Error
/usr/share/go/src/pkg/launchpad.net/gommap/gommap.go:104: undefined: os.Error
/usr/share/go/src/pkg/launchpad.net/gommap/gommap.go:115: undefined: os.Error
/usr/share/go/src/pkg/launchpad.net/gommap/gommap.go:126: undefined: os.Error
/usr/share/go/src/pkg/launchpad.net/gommap/gommap.go:137: undefined: os.Error
/usr/share/go/src/pkg/launchpad.net/gommap/gommap.go:151: undefined: os.Error
/usr/share/go/src/pkg/launchpad.net/gommap/gommap.go:151: too many errors

[lamvak (lamvak)]

This patch allowed me to compile and successfully import / use gommap with newest go.
Had to remove consts.c But then I was able to just go build, not using GNU make. (The results of the consts.c existed in my checkout anyways.)
This patch makes it only possible to build gommap, but it feels like gommap needs a little project-level reconsideration.

[Gustavo Niemeyer (niemeyer)]

As you've seen, I've updated gommap after a period of stagnation. Please let me know what you think of the new API.

[lamvak (lamvak)]

LGTM