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 r77438]
Added new empty file.


[SVN r77439]
Empty skeleton for functor_property_map.


[SVN r77440]
Added concept check for new functor_property_map.
Test fails.


[SVN r77441]
Disable test.


[SVN r77462]
Test for boost::function as property map.


[SVN r77463]
Added test for property map of boost::function using reference return type.


[SVN r77464]
Implemented property map for boost::function.


[SVN r77465]
Added test for boost::function1 as property map.


[SVN r77466]
Added property map implementation for boost::function1.


[SVN r77467]