Merge pull request #72 from joelpurra/ignore-log

Ignore generated *.log files
Merge pull request #71 from joelpurra/package-plugins

Automatially create plugin jar files with 'mvn package'
Merge pull request #73 from joelpurra/split-readme

Split README.md to BUILDIND.md, CONTRIBUTING.md, updated copyright years
Merge remote-tracking branch 'fatsu/master' into private-devel