This enables the inclusion of the non-boost tr1 headers if a recent
enough version of libstdc++ is detected. This als fixes a bug with
clang when sparsehash pulls unwanted tr1 headers.

This allows ones to specify exactly where the module will be installed.

This includes some corrections to the conference assignments made by
T. S. Evans.

This also synchronizes the code with the most recent boost version
(1.52).