OPAL-1647: Hide table and pager before fetching variables and show it when setting the list of variables.
Merge pull request #87 from emorency/master

OPAL-1647: Previous version was causing the pager to always only show 20 rows
OPAL-1588 - Implemeneted the Spss DTO and integrated the new datasource to Opal Client
OPAL-1588 - added data loading view
OPAL-1588 - added data loading view
Merge branch 'feature-OPAL-1588' of github.com:kazoompa/opal into feature-OPAL-1588
OPAL-1588 - added character set to spss datasource, modified views so user can choose the proper character set