Fixed count bug in Doctrine_Pager that was wrong counting the total of results found. Added 3 new methods: Doctrine_Pager::getExecuted (checks if the Pager was already executed), Doctrine_Pager_Layout::execute (handy access to execute Pager query without having to access Doctrine_Pager instance) and Doctrine_Pager_Layout::processPage (processes the template of a given page and returns the parsed string)

reverting the reorganization done in 3455-3456 in order to make merging my experimental branch to trunk easier.

Preparation for new organization of code in to sub packages. Changed autoload() to work with new structure.

CHG: Added documentation for Doctrine_Pager and Doctrine_Pager_Range* classes
TODO: Finish pagination documentation

ADD: Added methods: addMaskReplacement, removeMaskReplacement and cleanMaskReplacements in Doctrine_Pager_Layout. They are responsable to make masks behavior as another masks or values on predefined situations.

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Implemented Doctrine_Pager_Range functionality. This classes enables a powerful way to generate page ranges (Fowler's pattern) to be used coupled with Doctrine_Pager. Already implemented 2 of the most used ranges: Doctrine_Pager_Range_Jumping and Doctrine_Pager_Range_Sliding.