Extract revision stabler.

Not tested.
Merge pull request #7 from akr/patch-1

Extract revision stabler.
Add link to ci.hsbt.org
Fix detection of test-all failure
add SQLite case
Support revision format rNNN.
Merge pull request #8 from akr/patch-2

Support revision format rNNN.
Add links to mswin-build and KDDI Web Communications inc.
Update Ruby and Rails
Add ppc64 as a valid arch
fix typo
Add Microsoft and Datacenter OUOSL
Add ordinal to servers
rescue timeout to get_reports

Because the timeout is usually external server's error.
Thefore its backtrace is not useful.
Add opacity to old reports
switch condition if it uses SQLite3 or Postgres
remove extra chara
use raw
fix missing variable
Added the link to nurse/rubyci.