This commit was manufactured by cvs2svn to create branch 'RC_1_31_0'.

svn path=/branches/RC_1_31_0/boost/boost/date_time/; revision=21427
update version number

svn path=/branches/RC_1_31_0/boost/libs/date_time/; revision=21484
merged changes from main branch

svn path=/branches/RC_1_31_0/boost/boost/date_time/; revision=21574
merge shadow changes from main branch

svn path=/branches/RC_1_31_0/boost/boost/date_time/; revision=21606
fix unused var warning

svn path=/branches/RC_1_31_0/boost/boost/date_time/; revision=21617
update for bi-directional changes

svn path=/branches/RC_1_31_0/boost/libs/date_time/; revision=21825
fix doc for span

svn path=/branches/RC_1_31_0/boost/libs/date_time/; revision=21827
various updates for 1.31 release

svn path=/branches/RC_1_31_0/boost/libs/date_time/; revision=21834
a couple minor documentation updates

svn path=/branches/RC_1_31_0/boost/libs/date_time/; revision=22109
cleanup of licensing links

svn path=/branches/RC_1_31_0/boost/libs/date_time/; revision=22116
additional acknowledgements

svn path=/branches/RC_1_31_0/boost/libs/date_time/; revision=22123
update compiler status summary and limitation info

svn path=/branches/RC_1_31_0/boost/libs/date_time/; revision=22125