Merge 'trunk' into 'DBIx-Class-current'

Merge 'trunk' into 'DBIx-Class-current'

r1642@thor (orig r1505):  matthewt | 2006-04-22 16:29:28 +0000
cycle tests and a weaken call
r1657@thor (orig r1520):  bluefeet | 2006-04-26 22:15:41 +0000
Document the exitance of the DBIx::Class::ResultSource::schema() accessor.
r1660@thor (orig r1523):  matthewt | 2006-04-27 20:43:45 +0000
pod patch from ted
r1698@thor (orig r1561):  dwc | 2006-05-01 19:29:37 +0000
Add example of multi-column foreign keys
r1699@thor (orig r1562):  dwc | 2006-05-01 19:31:19 +0000
Add missing comma in example ;)