Migrating to Postgresql usage
Update README.md
Tabs changed to spaces.
Merge branch 'using_postgre' of https://github.com/unaguil/ckanext-metadata into using_postgre
rdflib-postgresql dependency added.
Fixing problem when reading config file
Error commented to avoid excesive verbosity.
get_task_status return message checked instead of ignoring it
README.md file updated
setup.py file updated to include rdflib-postgresql dependency