autoconf-like configure script support

svn path=/branches/RC_1_33_0/boost/tools/jam/; revision=31483
Add documentation for VC8

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31572
Merge from HEAD.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31702
Updated docs from Bronek

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31753
Clean up a whole lot of bad links

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31851