Trac #14226: add SAGE_SPKG_INST environment variable
Trac #13031: Use builtin cythonize() for building Sage modules.
Trac #13031: Force rebuiding all Cython files when the Cython version changes.
Trac #13031: Fix doctest sensitive to dict ordering.
Trac #13031: Flush after cythonize().
Trac #14385: Auto-generate python package list.
Trac #14388: use C casts rather than id()
Trac #14377: Store spkg logs in SAGE_ROOT/logs/pkgs/
Trac #12951: Allow cached non-cdef methods of extension classes. Rel #12215.
Trac #13194: Construct NormalFan and FaceFan from QQ-polytopesa
Trac #13989: Avoiding targets deprecated from PolyBoRi 0.8.3 (Trac #13989)
 * share/polybori/flags.conf
   (obsolete, PolyBoRi's header takes care of the predefines now)
 * non-versionated libraries polybori, polybori_groebner
   (using polybori-0.8, polybori_groebner-0.8 instead)
Trac #14391: Add matsolvemod to pari interface
Trac #1191: solve_right for matrices over Zmod(n)
Trac #13610: Adds a feature to doctesting code that can drop a user into a debug prompt when a doctest fails.
Trac #13610: sage -t --debug reviewer patch
Trac #14152: Add a test for sig_on_count()
Trac #14179: increase hardcoded timeout values
Trac #10054: Added alphabet for Upper/Lower mech words and cleaned up doc.
Trac #5814: Enable %prun in notebook.
Trac #14081: Solved bug, added doctest and comment