Removed warnings
Removed landscape layout

Layout is not appropriate for many menus (e.g. Freiburg). Deleting it to
prevent bad layout
Fixed a bug causing the app to crash when opening "about"
Added AboutActivity to manifest
Implemented Singelton design pattern on RssCache
Fixed min SDK issue
Fixed a bug causing the app not to actual reload the data

Fixed a bug causing the app not to actual reload the data when
pressing"reload"
Fixed a bug causing error toast not to be shown
Added project.properties to .gitignore