Added Menu and About screens, bugfixes and improvements

This version is good to go for the Local 2020 Elections on September 27.

It contains:

• bugfixes
• small improvements
• added Menu and About Screens
• moved some links and parameters into Remote Config

Improved iPad UI, small fixes

Merge pull request #167 from colcalex/develop

Login Button fixes

Minor fixes and db clear on old app update

This is the version that is in use in the first round of the Presidential Elections in November 2019

Minor changes and fine tuning

This release has some fine changes like support for Remote Config and also a flag to tell if the downloaded forms should contain the ones for diaspora or not (diaspora voting lasts 2 extra days and so it has forms for those days as well).

Major rewrite of the app

We wrote the UI from scratch, while also integrating a lot of good practices and design patterns to help further develop and maintain the codebase.