[Dbix-class] docs updated to help dbic beginners

[Krzysztof Krzyzaniak]

Hartmaier Alexander wrote:
> After talking to Matt (or should i say bombarding him with questions on irc 
> *g*) we've come to the conclusion that the docs need better 'newbie support' 
> (for people like me) and simply more examples as well.

Youre damn right!

   eloy
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        jak to dobrze, że są oceany - bez nich byłoby jeszcze smutniej