refactory to mvn project.
TODO:need test
removed unused files.
Merge branch 'master' of https://github.com/MadeInChina/ripple-lib-java.git
fix junit test.
Fixed test failure and refactory to mvn project
removed unused files.
refactory hierarchy and fix test bugs. refer:
https://github.com/ripple/ripple-lib-java/pull/15
refactory hierarchy and fix test bugs. refer:
https://github.com/ripple/ripple-lib-java/pull/15
Merge branch 'master' of https://github.com/MadeInChina/ripple-lib-java.git
Merge pull request #15 from MadeInChina/master

Refactor  to maven project(Include android project).