serverconfig: conditionally install expvar handler.

Add local copy of the standard library's expvar handler.

Change-Id: Ida41553345d7d29665f33268356bf16a80386e38
website: clean up overlooked notes.

Change-Id: Ida760b727d7fa9f45f553dad2096afca47cbfac4
verifyGoVersion: log.Fatalf was missing 'version' var

Change-Id: I10c71e96a598ec640131245b73ae201161f68622
Merge "verifyGoVersion: log.Fatalf was missing 'version' var"
Merge "serverconfig: conditionally install expvar handler."
Merge branch 'master' of https://camlistore.googlesource.com/camlistore into media
it works