Again... Prevent quoting two times the table name, bug report by g00fy on irc, seems like this bug could be on other drivers as well

Added some user functions (trim, ltrim, rtrim, sha1), the trim function prevented the tests from running

If you hada base Doctrine_Record class that implemented a Template and some classes
that inherited from this one using single table inheritance, the export process
failed because it tried to create several times the same table

Ticket: 423

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* added tableName option
* added deleteAll and createTable methods
* fixed fetch method
* fixed a bug with expire time in save method

'import' is a reserved word in PHP 6. Changed all method names / properties name from import to imprt. This means the documentation will need to be changed

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