Fixes #1 to replace expat with xml2js
Fixes #1 to replace expat with xml2js

This commit changes the implementation of the module to use xml2js
instead of expat, so removing the expat implementation.

*	new file:   LICENSE
- Adding the MIT license .

*	new file:   lib/index.js
*	deleted:    src/index.js
- Moved the main library to the lib directory.

*	renamed:    test/pom*.xml -> test/fixture/pom*.xml
- Moving the test fixtures to their directory.

*	modified:   test/index.js
- Adding the proper implementation of tests using mocha chai.

*	deleted:    lib/expat_parser.js
*	deleted:    lib/sax_parser.js
- Removing the implementations using expat.

marcellodesales/node-pom-parser,intuit/node-pom-parser