Add plugin for screen orientation

[psvensson]

This one, for example;

https://github.com/gbenvenuti/cordova-plugin-screen-orientation

Requested by community

[gokr]

Moving to Fredrika which needs a new viewer most probably.

[ghost]

Added in this commit: a6d8702

TODO:

• DONE Make tests to verify that the plugin works. See test results below.
• Update documentation page with plugin listing (API page)

[ghost]

Status update:

Test results for iOS:

• Report of screen orientation works (screen.orientation, and orientation changed event).
• Set screen orientation does not work.

Test results for Android:

• Report of screen orientation does not work.
• Set screen orientation works.

Conclusion: the plugin is half working on both Android and iOS, with different functionality working/failing on respective platform.

Should we include the plugin given these conditions? The result could be confusion/frustration among users.

[ghost]

We concluded to not include the plugin in Viewer 1.4, since it has some issues.

Recommend to revisit the plugin later and investigate status, review bug fixes and do testing.

Removing issue from Sprint Fredrika.