dynamic_bitset: full (recursive) sync with trunk for libs/dynamic_bitset/

svn path=/branches/release/libs/dynamic_bitset/; revision=49423
dynamic_bitset:
    completed sync with trunk (rev. 49425)

svn path=/branches/release/boost/detail/dynamic_bitset.hpp; revision=49426
dynamic_bitset: ported revisions 49433, 49586 from trunk

svn path=/branches/release/boost/dynamic_bitset/; revision=50470
merge of cmake build files from trunk per beman

svn path=/branches/release/libs/dynamic_bitset/; revision=50756