Merge branch 'release/0.3' into develop
Merge branch 'hotfix/0.3.1' into develop
Use jQuery.param() to build the URL query parameters string.
Allow to add an arbitrary number of input fields for one parameter.
Move the code to create a new input field into its own function.
Restore multiple value parameters from localStorage.
Merge branch 'feature/multipleValueParameters' into develop

Users can now add additional value inputs for each parameter. This is
very useful for API calls which allow or even need multiple values.
Updated Changelog with 0.4 features.
Version bump to 0.4
Merge branch 'release/0.4'