"scons test" and "install" and things should by default install
everything that they know how to build/install/test as most libraries
behave that way and doing everything individually requires a lot of
typing.
At least on unix systems lib is more popular than libs (regarding
build/libs).
Perhaps the name of doc/internal should be changed to something more
descriptive like API since it is actually what anyone who uses imp
should read (as opposed to just building IMP).
The boost version should probably be moved up to at least 1.35 as it
doesn't guarantee backwards compatibility and I don't think we any
idea about old versions.