Doctrine now works seamlessly in multi-connection environment where connections are bound to classes

Updated some docs, added identifier quoting to DQL, fixed some test cases, fixed dql select part handling

Added new exception classes, renamed Doctrine_Repository to Doctrine_Table_Repository, refactored many classes

removing the closing PHP tags form all php files, it\'s not needed and can break sessions which are whitespace sensitive

when using Doctrine::compile(), having the require_once()'s in the source files will break things. This is because the file hasn't been included, but the class has been defined in the compiled file.  This means you have to rely on autoload to allow compile to function (or strip out all require_once's from the code on compile, but atleast one needs to be maintained). IMPORTANT: you MUST now use autoload.

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[amadeus] changed exception name ($e) to not conflict with existing var of that name. Also minor spelling error.

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