[#559] Implement APK download as Dashboard url

* Visiting the http://instance.akvoflow.org/app redirects the browser to
  the S3 location where the APK is stored
* The redirection is to the latest published APK for that instance
* If the instance doesn't have any published APK, a "NOT FOUND" (HTTP
  404) is replied
Merge pull request #560 from akvo/issue/559

[#559] Implement APK download as Dashboard url
[#565] Adds "Download FLOW app" footer link
[#565] Better translations

* Based on @loicsans suggestion (in French)
Merge pull request #567 from akvo/issue/565

[#565] Adds "Download FLOW app" footer link
[#568] RELEASE NOTES v1.6.17
[#568] updating release notes with minor corrections
Merge pull request #569 from akvo/issue/568

Release Notes v1.6.17
[#572] Redirect to download SatStat APK
[#572] Redirect to download SatStat APK

* Changed URI to /gps
* Using Datastore entities instead of Properties file to store redirect address
[#572] Remove unused import
[#572] Using neutral constant for GPS URI
Merge pull request #573 from akvo/issue/572

[#572] Add URI to download SatStat APK
[#568] Update Release Notes
Merge branch 'release/1.6.17' of github.com:akvo/akvo-flow into develop
Merge branch 'develop' into feature/point-updates-v4
[#276] Recover code from manual merge + change property name

* Change property name from `isMonitoringGroupFlag` to just
  `monitoringGroup`
* This is a breaking change but the code has not been deployed, just in
  dev testing instance
* The Java convention is to use `isMonitoringGroup` for the getter in a
  boolean property, but the BeanUtils.copyProperties we're using (from
  Spring), is not able to detect the getter and just skips the property,
  when marshalling from the Dto to the domain object. That's why we have
  a getMonitoringGroup instead.
[#578] Fix NPE while parsing Boolean
[#276] Dashboard UI fixes

* Recover a way of passing a filter function to the populate method
* Reset the state of selected Survey Group when navigating between tabs
* Use && operator as guardian for checking the existence of some
  properties
[#276] Fixes problems when ingesting a SurveyInstance

* Part of the logic was removed in a previous merge
* The GEO data saved in the SurveyInstance was not copied to
  SurveyedLocale
* DisplayName (META_NAME) was missing too