Removed .DS_Store files and added a .gitignore.
Fixed a few issues in the POM.

* Added Clojars Maven repository for retrieving Storm
* Updated the parent module to no longer be storm-contrib to be more inline with storm-contrib's new Git-based model
* Tokenized the Aerospike Client and Storm versions
* Added maven-exec-plugin to simplify running the application
Merge pull request #1 from whitlockjc/master

Remove .DS_Store files and fix POM