[build] adding travis build file
[build] altering buildfile to use project structure more similar to traditional Android libraries
[build] updating android-tools version; adding shell script to wait for emulator (for travis-ci); fixing context bug in RouterTest
[build] addin travis-ci build status image to README
[build] removed RoutableTestTest (tests' AndroidManifest.xml file not needed since gradle auto-generates it); removed empty proguard config; removed legacy ant buildfile