* libs/python/build/Jamfile.v2: Sense the location of python headers. Export
include paths.
* libs/python/example/Jamfile.v2: New file.
* new/targets.jam: Use refined properties for constructed
dependency properties
* new/gcc.jam: Handle 'find-library'. Set soname for dynamic libraries.
* new/builtin.jam: New feature 'find-library'.
[SVN r15966]