Mavenise and fix compilation

- Removes the broken ant-based build.xml
- Adds in a project pom.xml
- Adds in also a main-class based jar packager in pom.xml
- Removes an unused import that fails compilation
- Adds notes of usage to README.md
- Adds a .gitignore for the maven target/ build directory
Merge pull request #1 from QwertyManiac/master

Mavenise and fix compilation