Updated ProjectBacklog to most recent edition
Organized the docs folder.

* Moved all mockups into docs/mockups
* Moved all sprint documents into docs/Sprints/sprintN
* Added a Wiki folder with an exported version of our wiki.
Clean up and organized imports of all files
Removed obsolete TODOs.

* Removed the big block of debug code from playerShipView.
* Removed the assertion for slice <= 0, didn't have much use.
IintelliJ analysis fixed some minor issues.
Eclipse cleanup after IntelliJ
Removed TODOs that were either irrelevant or already fixed.
Added changelog.md
Updated changelog
Added Sprint 5 planning
Added an icon to the app
Exported new .apk for release 6
Bump app android version.

* Increased the versionCode by one as this is a new release.
* Changed the version name to Release-6, we might want to change this to some type of semantic versioning later on.
* Re-exported the .apk with the new manifest.
Updated to newest wiki pages
Merge branch 'development' into release6
Structured the project backlog
Merge branch 'development' into release6
Updated sprint 2 and 3 planing
Merge pull request #47 from Jokab/release6

Merging "Release 6" into dev