Avoid out of memory bug in php 5.2 and 5.3
clearify readme on update() function
update () should return -1 in case if failed
bug #129: Check correct execution status instead of affected rows,
Refactor bugfix to a more streamline code
Utilize new count data on update in tests
buildWhere() refactoring
Added param to rawQuery() to disable query variable filtering
Update readme a bit
Merge pull request #130 from avbdr/master

Avoid out of memory bug in php 5.2 and 5.3 / 	bug #129: Check correct execution status instead of affected rows,