Fix a bug which caused double loading of Jamfile in some cases. Also,

simplify some things.

* new/project.jam
  (load): Tweak
  (lookup): Remove.
  (find): Simplify.


[SVN r20430]

tools/build

@@ -1 +1 @@
-Subproject commit 9a75d3bb35e3fac9377fc3eaae73494bbae47e1c
+Subproject commit e1855f185bfe2c130d247d3413ee427121c17432