Initial implementation for comment adding feature
Submit the ajax form through ajax and display a message to the user
Added view comments link
Add recaptcha support for comment submission
Added recaptcha_ajax.js, properly remove the dialog on close
Display success message differently for authenticated and anonnymous
Added basic validation for comment submissions
Added validate function to comment submission
chart title and target=_blank for the link
WIP: Implement Import/Export WHITELIST from/to xls
Updated whitelist import/export to xls feature
Added class to info msg tag
Merge branch 'devel-fix' into staging
Updated whitelist mgmt with the following changes:

- Modified initial JSON structure
- Changed @@whitelist.json view to dataset context
- Added select for @@manage-whitelist with the available datacubes
- Added js for @@manage-whitelist options display based on datacube selection
- WIP: updated import/export feature to support contextual whitelist settings
Updated whitelist implementation:

- Made export to xml view to be contextual
- Properly set the whitelist property when importing xml and no previous settings saved
- Hide table when no whitelist settings are present for the selected dataset
Added upgrade step for migrating whitelist settings for each datacube
Use an empty WHITELIST dictionary as default
Updated whitelist mgmt with the followint changes:

- Drop hardcoded labels/headers for whitelist settings
- Allow import of xls files with any number of columns. The first row cells
  values will be used as attributes/labels
Merge branch 'devel-fix' into devel
Merge branch 'devel' into staging