1.1.4

• Change maven badge from maven-badges.herokuapp.com to shields.io (but link still leads to maven-badges.herokuapp.com)
• Change bintray badge to shields.io badge (for custom label)
• Update gradle 2.6 -> 2.8
• Update checkstyle 6.9 -> 6.11.2
  • compatibility.jar is not required anymore and must be removed from gradle/config/checkstyle/compatibility.jar
• Update pmd 5.3.3 -> 5.4.0
• Update gradle-bintray-plugin 1.3.1 -> 1.4
• Update gradle-release 2.2.0 -> 2.3.0