Merge pull request #4 from matthias-mo/7.x-1.x

Fix for "Call to undefined function language_negotiation_get_switch_link...
[Import] Gender salutation mapping is better done in hook_entity_presave().
Refactor/split campaignion_webform2redhen

- The queue mechanism is now implemented in campaignion_action. Other
  modules can use the hook_campaignion_action_taken() to do imports
  asynchronously for each webform submission.
- The import itself is now part of the campaignion_supporter starterkit
  module.
Fixed name for hook_uninstall function name