* new/targets.jam (main-target.generate) Add extra path component to
virtual target which free properties are not equal to project's.
(basic-target.generate): Pass refined properties to 'construct'.
(virtual-target.extra-path): New rule.
(virtual-target.actualize): Make use of extra path.
* new/property.jam (take-free): New rule.
[SVN r14396]
* new/target.jam (main-target.generate): Give a more detailed error
message when no alternative is found. (basic-target.generate):
Don't exit with error when requirements can't be satisfied. Just
return an error string.
[SVN r14393]
* new/targets.jam (main-target.generate): Select the alternative
based on the list of non-free requirements.
* new/property.jam (remove-free): New rule, removes free property from
a property set.
[SVN r14391]
* test/TestCmd.py: Cause the names of preserved directories to be
printed.
* test/test_system.html: Document "PRESERVE*" environmental variables
and "pass_test"/"fail_test" methods.
[SVN r14389]
* new/property.jam (make): New rule, constructs property set from
what the user gives. Handles implicit features.
* new/project.jam, new/targets.jam: Use 'property.make'.
[SVN r14370]
* jam_src/Jamfile, jam_src/boost-jam.spec, jam_src/patchlevel.h:
Updated version number to 3.1.1.
* jam_src/jam.c: Made JAM_VERSION three-element string.
* bootstrap.jam: When JAM_VERSION is 3.1.1 or more, call UPDATE
explicitly on all non-option element in the command line.
[SVN r14363]
* new/project.jam (project-attributes): New class to keep all the
project related data. (attritutes, attribute): New rules to access
the project attributes. (target): New rule to access the project
target for a jamfile module.
(initialize): Store attribute in project-attributes instance.
(project): Moved to jamfile module.
(assign-option): Moved with modifications to project-attributes.get.
* new/targets.jam, new/project-root.jam, new/make.jam,
new/build-system.jam: Induced changes.
[SVN r14362]
