Update Disclaimer on APK

On the last part of disclaimer (#3), please replace with the following ( #3 and #4):

3. mUzima is copyrighted to The Trustees of Indiana University, Moi University, and Vanderbilt University Medical Center.

4. If the user of this application is an entity intending to commercialize or make a profit out of any application that uses this code in a for-profit venture, the user is required to contact the copyright holder through info@mUzima.org.