[#74] Fix `Clear` menu option

* Override parent class' 'resetQuestion', in order to call the
overloaded one and clear the UI field.
[#75] Add Quiche language support
Merge pull request #76 from akvo/issue/75

code reviewed and correct
Merge pull request #81 from akvo/issue/74

[#74] Fix `Clear` menu option
[#80] Increase version number
Merge branch 'master' into release/1.13.3
Merge branch 'release/1.13.3'