Morpho

The upload method in DataPackage class calls the method incrementPackageIds.
This method puts the metadata files into strings which is problematic for very
large packages.
Also, data and metadata are treated identically which causes a problem when
attempts are made to put ids into data file.
Also, upload attempts to see if a file is data by checking whether or not it is
an xml file. This will cause problems if XML is ever used for data.
Should add method to check if file is a data file (using triples).