4.0.x fix - func_get_args PHP 5.2
IIS "support" and other tweaks from the 4.0.x branch.
4.0.x branch fixes for IIS/Windows
Switched from non-mainted jsMin to JShrink.
Apparently I forgot to push the JShrink library in that last commit.
Removed old upgrade things.
Fixed PHP 5.2 header_remove issues.
Merge branch '4.1-devel' into 4.2-devel