Java API sample

Doesn't work on Windows or Mac yet, help to prepare the packaged jars is welcome.

For now to try it:

On Linux you can do

1. Build recent kaldi
2. git clone https://github.com/alphacep/vosk-api
3. cd vosk-api/java
4. export KALDI_ROOT=<KALDI_ROOT>
5. export JAVA_HOME=<JAVA_HOME>
6. make
7. make run

For details of the code you can check:

https://github.com/alphacep/vosk-api/blob/master/java/test/DecoderTest.java