Update version to 3.0.9 and rebuild packages.

MATLAB: Replace XML parser with Xerces

sdmxHelper: Fix Content page version information
Add test for the data acquisition

Java: Update version to 3.0.7

Java: Add to the manifest package (implementation) version.

MATLAB: Add to the repository compiled jar for MATLAB and STATA

Merge pull request amattioc#227 from viguice/viguice

Workaround when proxy returns HTTP_PROXY_AUTH code