Prevent Apply changeset button to raise an Exception if the changeset is
empty.
Hide Changeset tab after clear or successful install.
Merge pull request #691 from Ormira/Issue#659

Prevent applying an empty changeset.
Adding CKAN-core submodule
Adding CKAN-GUI submodule
Adding CKAN-cmdline submodule
Adding CKAN-netkan submodule
Merge pull request #703 from AlexanderDzhoganov/master

** IMPORTANT - MERGE BEFORE ANY OTHER PR! ** Splitting the repos - "Here goes nothing" edition