Various changes and updates.

- Remove all PMD rulesets except braces, PMD turns out to
  be more and more annyoing; rules need to be actively
  curated.
  See https://github.com/kitei/kitei-rules/blob/master/src/main/resources/pmd/kitei-standard.xml
  for an example
- Upgrade commons-configuration dependency to 1.10 (from 1.9)
- Upgrade maven-duplicate-finder-plugin plugin to 1.0.5 (from 1.0.4)
- Upgrade findbugs plugin to 2.5.3 (from 2.5.2)
- Upgrade deploy plugin to 2.8.1 (from 2.7)
- Upgrade install plugin to 2.5.1 (from 2.5)
- Upgrade release plugin to 2.4.2 (from 2.4.1)
- Upgrade license plugin to 2.5 (from 2.2)
- Enforce findbugs 2.0.2 in the findbugs plugin