Documentation improvement

Code minor fixes. Documentation improvement with markdown integration in Javadoc, README.md as Javadoc docs overview description.

The first Android ready release (2.0.0) towards multi-language (in progress)

Refactoring (API breaking changes) of all classes and packages, tokenizer (Apache Lucene removed) to be Android ready, and the single language concept towards multi-language (in progress). Some fixes. Some Java 1.7 compatible object-oriented and performance improvements. Tests 100% OK as expected!

The first stable version (1.1) released

This first stable API version (1.1) released with tests 100% OK and all the functionalities working as expected.
Although performance improvement may be needed after profiling, the current code is production stable.