[#880] Implement timezone rest service
[#880] Clean up code
[#880] Add seconds to the time format
[#888] implement 'multiple' property in questions

* at the moment, this property is only shown in barcode questions.
[#888] Use allowMultiple flag instead
[#855] Add missing index
Merge pull request #891 from akvo/feature/855-missing-pagination

[#855] Add missing index
Merge pull request #893 from akvo/feature/880-time-service

Feature/880 time service
[#855] Keep track of cursor type in metaControl
[#855] Refactoring
Merge pull request #894 from akvo/feature/855-missing-pagination

Feature/855 missing pagination
[#895] Release Notes 1.7.6
Merge branch 'release/1.7.6'
Merge branch 'master' into develop
[#853] Disallow deletion of questions which has dependant questions pointing to it
[#896] Clear selectedQuestion when clicking 'hide questions'
Merge pull request #898 from akvo/issue/896

[#896] Clear selectedQuestion when clicking 'hide questions'
Merge pull request #897 from akvo/issue/853

[#853] Disallow deletion of questions which has dependant questions poin...
[#900] Added indexes for displayName and identifier
Merge pull request #901 from akvo/issue/900

[#900] Added indexes for displayName and identifier