converts absolute paths to relative to get build working for me
abstracts out sdk path in build_headers script, regenerates headers, removes built .class files from script from source control, adds project dependency to maplytester
fixes gitignore for class files
adds layout manager header, moves ok libs to third-party to better match sjg's directory structure
updates maply tester library paths to reflect new location
marks libs as exported so that they'll get rolled into the apk