1.1: added check for available project configuration when discovering tasks.  This change allows symfony to find plugin tasks when the plugin directory has been changed in ProjectConfiguration.
1.1: added check for available project configuration when discovering tasks.  This change allows symfony to find plugin tasks when the plugin directory has been changed in ProjectConfiguration.


git-svn-id: 7038a89b398528086dab5106cc8d05243a854dbc@9721 ee427ae8-e902-0410-961c-c3ed070cd9f9

theodo/symfony1.1-backports,theodo/symfony1.1-backports,theodo/symfony1.1-backports