0.8dev: Removed //Trac// and //setuptools// from package installation requirements.

//Trac// should not be specified as an installation requirement. It causes problems when running `pip install -U`. See also discussion in th:#9800.


git-svn-id: https://svn.apache.org/repos/asf/bloodhound/trunk@1582592 13f79535-47bb-0310-9956-ffa450edef68