android SPV bitcoin wallet
Prerequisites:
- Android Studio 2.1.1
- BreadWallet/build.gradleGradle -> classpath 'com.android.tools.build:gradle-experimental:0.7.0-rc1'
- BreadWallet/gradle/wrapper/gradle-wrapper.properties -> distributionUrl=https://services.gradle.org/distributions/gradle-2.10-all.zip
- init/update git submodules
- NDK -> android-ndk-r11c