Created branch to extend PropertyMap:
add a readable functor map that calls a given functor or function upon lookup.
Ideas from: http://comments.gmane.org/gmane.comp.lib.boost.user/54397
and: http://comments.gmane.org/gmane.comp.lib.boost.user/73358

SVN-Revision: 77438
Added new empty file.

SVN-Revision: 77439
Empty skeleton for functor_property_map.

SVN-Revision: 77440
Added concept check for new functor_property_map.
Test fails.

SVN-Revision: 77441
Disable test.

SVN-Revision: 77462
Test for boost::function as property map.

SVN-Revision: 77463
Added test for property map of boost::function using reference return type.

SVN-Revision: 77464
Implemented property map for boost::function.

SVN-Revision: 77465
Added test for boost::function1 as property map.

SVN-Revision: 77466
Added property map implementation for boost::function1.

SVN-Revision: 77467