Trac #13357: initial version
Trac #13557: update the autotools spkg, add Texinfo
python-sage work without cliquer patching (#14349)
module_list: add cl.c to cliquer.so sources (#14349)
Update Singular to version 3-1-6.
Update Singular function interface to API changes in Singular 3.1.6.

iiMake_proc function in libsingular no longer returns an sleftv. Instead, the
return value is a boolean error condition and the return value is stored in a
global variable iiRETURNEXPR.
Remove description of deleted patches.
Update sagenb to version 0.10.7.3
Update PPL to version 1.1.
Update sagenb version to 0.10.8
Update ncurses to dev version 5.9-20131221.
trac #15623: Immutable graph backend for Posets
Support top-level make -jN
Trac 15623: Let to_graph return an immutable graph
Reintroduce ATLAS archdef tarballs.
trac #15623: rebase on 6.1.beta4
trac #15623: Rebase on updated #15622
trac #15623: Removing the hack from #15622, update a variable's name
trac #14349: rebase on 6.1.beta4
trac #14349: move cl.* to cliquer/