Update README.md

modified download way.
Polish translation
Merge pull request #10 from appunite/pl_translation

Polish translation
release 0.0.6.
apply gradle-mvn-push plugin.
add gradle.properties.
modify .travis.yml
update sample dependency.
delete unused files.
downgradle buildtoolsversion.
FIX localization
Merge pull request #11 from maarekj/patch-1

FIX localization
add contributor

add @maarekj to contributor.
delete @author from javadoc.
change showRateDialog access lebel public.
add debug flag.
add event monitoring.
refactoring.
update verison.
refactoring library module.