Adding maven central badge

[ci skip]
updating documentation

[ci skip]
updating links; adding ohloh badge

[ci skip]
adding pmd and a "quick" profile

[ci skip]
fixing pmd warnings
another documentation change

[ci skip]
fixing a typo
Merge branch 'master' into jasmine-maven-plugin-2.X.X

* master:
  fixing a typo
  another documentation change
  fixing pmd warnings
  adding pmd and a "quick" profile
  updating links; adding ohloh badge
  updating documentation
  Adding maven central badge