Backport revisions for the 2.70a release
d2660a0, 6e99fb0, 58c22d8, 83f2012 + ff21f6a, a7ed1db. cc6b106
7997e38, 9d4b54b, efb48fc, 3fc293c, 29f359c, 77c1d17, 92a539e,
c626462, f48828b, 6452d9f, 765d077, 74518b2, af16d46, 8da4936,
6babbf5, f0106d2, f88776b, ee72cba, 467596d, e21a7b3, eed3974,
71a2ff1, ccf9afd, 44d6c68, 30fdfc3, b69809c, b0a8e4c, bd57ec6,
3b0832d, 2a25676, 3977b76, fb25a86, 9bbb30b, 51abc2b, 0ebade5,
2c0e32f, 3deaf7d, ea01b24, c61eb64, f3db038, a6fb670, eedde31,
b66a954, 7ff123c, f5b79df, 7148c97, 54a8753, fcaa018, 4c73001,
7a21330, 07578be, e9a64e2, fd3de8b, ae792e9, b7712a7 + 3600622,
d9557d0, 6d973b8, 688257d, 4acb57a, 95ac6bc,
Also backported openmp changes to sculpt making it so number
of real CPU cores is used as a number of threads here.
