Fix BuildConfig.DEBUG in module library

library_buildconfig

answer: http://stackoverflow.com/questions/20176284/buildconfig-debug-always-false-when-building-library-projects-with-gradle
Complete documentation can be found here http://tools.android.com/tech-docs/new-build-system/user-guide#TOC-Library-Publication

[LIBRARY - build.gradle]
android {
    publishNonDefault true
}


[APP]
dependencies {
    releaseCompile project(path: ':library', configuration: 'release')
    debugCompile project(path: ':library', configuration: 'debug')
}