latest gxp to get fix for queryable in OLSource layer records
Merge pull request #325 from bartvde/olrecord

latest gxp to get fix for queryable in OLSource layer records
Making 'Linux' more prominent on our Ubuntu/RHEL install pages (closes #162)
Making more obvious how install packages
Fixing bad jetty path (closes #291)
Removing references to port 54321 (closes #314)