remove doctrine1 dependency

symfony 1 has always worked fine without Doctrine (e.g. with Propel, or even without any ORM).
Also, without any stable tag in lexpress/doctrine1, it's impossible to install without lowering minimum-stability to "dev".
add requires
update changelog about dependencies
Merge pull request #35 from garak/patch-1

Remove doctrine1 dependency
Fixbug, refact. BC on sfCacheSessionStorage
Merge pull request #44 from BaptN/master

Fixbug, refact. BC on sfCacheSessionStorage
Avoid a PHP Warning on setAttribute

This sometimes results in an error:

    PHP Warning:  DOMElement::setAttribute(): string is not in UTF-8 in /var/www/projects/lib/vendor/lexpress/symfony1/lib/vendor/lime/lime.php on line 107
Update sfTask.class.php

Remove deprecated preg_replace with 'e' pattern modifier on sfTask/getDetailedDescription method

Update sfTaskTest.php

Add sfTask/getDetailedDescription test

Update sfTaskTest.php

Update sfTask.class.php