Upgrade Singular

Imported from <a href="http://trac.sagemath.org/sage_trac/ticket/13237">trac #13237</a>.

Diff for the singular spkg p0->p1. For reference / review only.

Reported by: jdemeyer

Component: packages

CC: fbissey,, malb,, jpflori

Report Upstream: None of the above - read trac for reasoning.

Authors: Jeroen Demeyer, Alexander Dreyer, Dmitrii Pasechnik, Karl-Dieter Crisman, Jean-Pierre Flori

Dependencies: 

Work issues: 

Reviewers: Alexander Dreyer, François Bissey

Merged in: sage-5.4.beta0

Attachments: <ol><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/13237/13237_singular_3_1_5.patch">13237_singular_3_1_5.patch: Patch for the Sage library</a> by jdemeyer at 20120802T10:04:45</li><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/13237/singular-3-1-5.p0.diff">singular-3-1-5.p0.diff: Diff for the singular spkg. For reference / review only.</a> by jdemeyer at 20120810T21:00:58</li><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/13237/13237_tests.patch">13237_tests.patch: Additional patch</a> by jdemeyer at 20120827T10:34:01</li><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/13237/singular-3-1-5.p1.diff">singular-3-1-5.p1.diff: Diff for the singular spkg p0->p1. For reference / review only.</a> by jdemeyer at 20120829T09:39:39</li></ol>