* Install JPL bridge by default, change switch to turn it off
Needs Apple's Java Developer Update 3
* 10.5 needs a newer version of expat than the system version
Formula no longer includes JPL by default to get around an error that
Apple's introduced in OSX 10.6 with broken symlinks to the JNI .h files.
Also, now checks for X11 and disables xpce if required, and uses the
Homebrew ENV.x11 system to include the appropriate libraries and
headers.
Signed-off-by: Adam Vandenberg <flangy@gmail.com>