Merge 'trunk' into 'reduce_pings'

r6009@hlagh (orig r7037):  dandv | 2009-07-13 08:06:08 -0400
PK::Auto has moved into Core since 2007
r6010@hlagh (orig r7038):  dandv | 2009-07-13 08:15:13 -0400
Fixed has_many example in Intro.pod
r6011@hlagh (orig r7039):  dandv | 2009-07-13 16:58:45 -0400
Fixed run-on sentences in FAQ
r6012@hlagh (orig r7040):  dandv | 2009-07-13 17:18:11 -0400
Minor POD fixes in Example.pod
r6013@hlagh (orig r7041):  dandv | 2009-07-13 17:48:18 -0400
Favored using ->single to get the topmost result over less readable ->slice(0)
r6014@hlagh (orig r7042):  dandv | 2009-07-13 18:56:31 -0400
Minor POD fixes in Cookbook
r6015@hlagh (orig r7045):  ribasushi | 2009-07-14 07:30:55 -0400
Minor logic cleanup
r6016@hlagh (orig r7046):  ribasushi | 2009-07-14 08:07:11 -0400
grouped prefetch fix

diff --cc lib/DBIx/Class/Storage/DBI.pm
Simple merge