Changed rhino url.
Remove downloaded rhino resources on clean.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	build.xml
Path to r.js. Removing xars in build on clean.
Reverting to use the xqlint r.js in support/xqlint instead of rhino's in tools/.
Adding fork=true and failonerror=true to java task in the xqlint target.
Adding rebuild target.
Add condition to set rhino optimization to -1 if 32bit property is set.
Adding version filtering in index.html and expath-pkg.xml.
Moving check of availability of rhino and closure to dendency of get-*-target.
Adding optional git commit id to xar fie name.
Merge pull request #20 from ljo/master

Ant build process changes