* Do not rewrite parents in RevWalkTextBuiltins
* RevWalk: Allow disabling parent rewriting
* RevWalkTextBuiltin: Add -n to limit number of commits returned
* [findBugs] Don't ignore exceptional return value of File.mkdir()
* [findBugs] Don't rely on default encoding
* [findBugs] Don't call toString() on a string
* Add missing javadoc for archive code
* Remove unused import in Archive
* Drop unnecessary "throws" clauses in archive code
* Move FormatActivator.start()/stop() to a separate class