Documentation and bug fix

This release contains a minor bug fix with image uploads and documentation detailing how to configure build.gradle to support image uploads. For your apps, build.gradle will need to compile Drive dependencies.

compile 'com.google.android.gms:play-services-drive:10.2.1'
compile('com.google.apis:google-api-services-drive:v3-rev69-1.22.0') {
    exclude group: 'org.apache.httpcomponents'
    exclude group: 'com.google.code.findbugs'
}