* new/builtin.jam: Make 'obj' main type.
* new/generators-test/*: Try compiling the same CPP file with
different defines and linking in the same exe.
[SVN r15649]
* virtual-target.jam (virtual-target.actualize): Accept
'scanner' parameter and create different actual targets
for different values of that parameter.
(virtual-target.includes): Remove.
(binding): New rule
(remember-binding): New rule.
* type.jam (set-scanner): New rule. (get-scanner): New rule.
* scanner.jam: New file.
* class.jam (__init__): Define __name__ in class scopes.
* builtin.jam (c-scanner): New scanner class, associated with CPP
files.
[SVN r15644]
