Remove zodb from sage

Imported from <a href="http://trac.sagemath.org/sage_trac/ticket/10353">trac #10353</a>.

remeve reference to zodb in sage_root

Reported by: was

Component: misc

CC: kini

Report Upstream: N/A

Authors: François Bissey

Dependencies: <a href="http://trac.sagemath.org/sage_trac/ticket/12205">trac #12205</a>, <a href="http://trac.sagemath.org/sage_trac/ticket/13717">trac #13717</a>, <a href="http://trac.sagemath.org/sage_trac/ticket/13963">trac #13963</a>

Work issues: 

Reviewers: Jeroen Demeyer

Merged in: sage-5.7.beta1

Attachments: <ol><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/10353/trac10353-db-removal.patch">trac10353-db-removal.patch: this patch remove reference to zodb from the sage library</a> by fbissey at 20130104T10:16:48</li><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/10353/trac10353-sage_root.patch">trac10353-sage_root.patch: remeve reference to zodb in sage_root</a> by fbissey at 20130107T10:07:29</li></ol>