Let MPIR build without C++ support on Cygwin.
Various Cython files using mpn_popcount need to be linked to gmp.
Added flush and seg to Tableau class
Fixed documentation errors.
Fixed content statistic for marginally large tableaux.
Really fixed documentation errors this time.
Merge branch 'public/combinat/fix_mlt_stat-15690' of trac.sagemath.org:sage into public/combinat/fix_mlt_stat-15690

* 'public/combinat/fix_mlt_stat-15690' of trac.sagemath.org:sage:
  Fixed content statistic for marginally large tableaux.
Efficiency tweaks to content() in infinity_crystals.py.
Merge branch 'public/combinat/seg_flush-15689' of trac.sagemath.org:sage into public/combinat/seg_flush-15689

* 'public/combinat/seg_flush-15689' of trac.sagemath.org:sage:
  Really fixed documentation errors this time.
  Fixed documentation errors.
  Added flush and seg to Tableau class
Review changes.
More speedups.
Trac #15630: Various Cython files using mpn_popcount need to be linked to gmp

Surely since #13352, coding_theory/binary_code uses mpn_popcount and so
needs to be linked to gmp.
At least on Cygwin this needs to be done explicitely trhough
module_list.py.

Same problem for graphs/convexity_properties and a few other files.

URL: http://trac.sagemath.org/15630
Reported by: jpflori
Ticket author(s): Jean-Pierre Flori
Reviewer(s): Travis Scrimshaw
Trac #15690: Fix content for marginally large tableaux

Currently, ''-i'' boxes in the ''i''th row are contributing weight 2 in
type ''C'' to the overall content, but should only contribute 1.

URL: http://trac.sagemath.org/15690
Reported by: bsalisbury1
Ticket author(s): Ben Salisbury
Reviewer(s): Travis Scrimshaw
Trac #15689: Implement flush and seg statistics on tableaux

Implements the segment and flush statistic for semistandard Young
tableaux.  Definition of the statistics may be found in arXiv:1401.1185.

URL: http://trac.sagemath.org/15689
Reported by: bsalisbury1
Ticket author(s): Ben Salisbury
Reviewer(s): Travis Scrimshaw
Trac #15365: Let MPIR build without C++ support on Cygwin

GMP/MPIR used to include a hack to configure faster.
This makes GMP/MPIR build badly on cygwin when C++ support is disabled
and is not needed anymore anyway.
See:
* https://sourceware.org/ml/cygwin/2013-06/msg00580.html
The spkg here backports a fix from:
* https://github.com/wbhart/mpir/commit/2320c7d965e3277fddaf2390fdf7032d
34954c8c

Use git branch.

URL: http://trac.sagemath.org/15365
Reported by: jpflori
Ticket author(s): Jean-Pierre Flori
Reviewer(s): Travis Scrimshaw