Fix PATH clobbering problem.
Add include path.
Add include path.
Add include path for Darwin.
Rename FWRITE to ASF_FWRITE to avoid a conflict with fcnti.h on Darwin.
SConstruct cleanup.
Tweak SConstruct for Darwin.
Tweak SConstruct for Darwin.
Add libpath for Fink.
Use 'darwin' flag on Darwin.
Remove reference to nonexistent 'projects.h'.
Revert "Remove reference to nonexistent 'projects.h'."

This reverts commit 51ea88ada4f184ff497b8f1a023dd1ade8a613f3.
Merge pull request #352 from asfadmin/jsn

Big update for Darwin compatibility.