export GOPATH

Fixes #1

Also update the update target to not blow away the 103 results.
added note about contributions
Backport CL 6501099 to 1.0.3 to support ARMv6
backport CL 6501099
remove unused arm files
add note about benchmarking on arm
removed unused test
Merge pull request #5 from davecheney/goarm

Fix arm benchmarking, Fixes #3
Merge remote-tracking branch 'upstream/master'