[#619] Insert version number 1.0 on Dashboard for new survey

* Initial version number is set in Dashboard for new surveys.  This is mostly for display purposes as the version number calculation happens in the application (GAE)
[#619] Increment new survey version number
[#619] Do not increment survey version number during survey publish
[#619] Reset survey version number when copying survey
[#619] Default version number when retrieving surveys

* Applies to the actions list all surveys, list surveys in survey group and list single survey. In the previous setup we did not set a survey version on first creating survey. In these cases the survey default version number is set when we retrieve the survey.
[#619] Increment version number when editing published survey
[#619] Instantiate with Double literal
Merge pull request #636 from akvo/issue/619

[#619] Survey version number is not consistent between dashboard and published versions on devices