falldown3d

I've refactored the SelectLevelActivity class (and created some other classes), removed MessageBox, removed the texture resolution (because of current devices capability), extended the BaseActivity functionality, created Preferences class.
#FALLDOWN-42 - Sonar Issue #94ed3ca8-c4e2-4e68-a5f2-cc10a668602e - Ncss Method Count
#FALLDOWN-45 - Sonar Issue #24e3b713-ec40-4a30-9ce1-5fb45e19109f - Ncss Method Count
#FALLDOWN-46 - Sonar Issue #6ebb8217-97d8-45ea-933b-0438bebc4e10 - Methods should not be too complex
#FALLDOWN-53 - Sonar Issue #a5d23d6c-58ed-450c-a6ff-7fdf93262e7c - Methods should not be too complex