Add initial pom.xml setup for Maven

Set up according to the guidelines at http://goo.gl/ilv4

Also:
* Move src/com to src/main/java/com to be compatible with Maven
* Add target directory to .gitignore
[maven-release-plugin] prepare for next development iteration
Merge pull request #41 from brk3/master

Add pom.xml to enable Maven builds and release management