Merge pull request #10 from OpenRefine/master

Merge master
Set z-index for the service list panel to avoid unwanted overlas with
the service panels
Accept 1.9 as a valid Java VM version

This makes openrefine start up with a 1.9 VM (ea snapshot)
Merge pull request #904 from ankon/master

Accept 1.9 as a valid Java VM version
Fix Javascript so non-Freebase preview popouts work.
Merge pull request #891 from Blakko/new-services

Fix reconciliation service modal so service panel list doesn't overlap services from @Blakko
Add XLSX export menu option - fixes #897