- added pretty chenge version libs in gradle
- fixed create new HashMap with `guava`
- uncomment findbugs and pmd analys
- moved jar task after success run tests
- fixed 1.7 java to 1.6 in gradle
- update gradle wrapper
- fixed 1.6 compatibility
Merge pull request #2 from rmuhamedgaliev/gradle-fix

- added pretty chenge version libs in gradle