Update CActiveFinder.php

Adds the missing "params" array from the query object.
Update CHANGELOG
Update CHANGELOG
Merged #2230: Fix using "having" with bound params in CActiveRecord::count()
"CActiveRecordTest::testCountWithHavingRelational()" has been updated exposing issue #2201
Update CUploadedFile.php

adding to documentation of 'saveAs()' a few words regarding the fact that it's overwriting existing files (if exists) without any questions asked
Merge pull request #2237 from boazrymland/master

A little update to saveAs() documentation for better clarify/verboseness
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