Remove redundunt flush
Utilitt of Checkstyle, PMD, findbugs in maven.
Add coveralls support.
Coverage by JaCoCo.
Fix JaCoCo version.
Coveralls source directory is src/main/java.
Revert "Coveralls source directory is src/main/java."

This reverts commit d1857d675540e64c7753ee21882197de0fc59303.
Add coveralls badge.
add LICENSE (MIT).
Merge pull request #2 from umireon/static_analysis

Static analysis