Doc formatting and other minor doc changes.
Doc formatting and other minor doc changes.


git-svn-id: 319eb561774c901116a2c19d0db24e717df3a3eb@54 40d66c6c-0ee5-11de-8837-45bce846067a

Scondo/purepng,Scondo/purepng,mnaberez/pypng,drj11/pypng,drj11/pypng,mnaberez/pypng