Update to Elasticsearch 0.90.8 / Lucene 4.6.0
Move tests to JUnit

Closes #11.
Closes #14.
Add JapaneseIterationMarkCharFilter support

Currently, Kuromoji have JapaneseIterationMarkCharFilter.
Add IterationMarkCharFilter to analysis-kuromoji.

Closes #7.
prepare release elasticsearch-analysis-kuromoji-1.7.0
prepare for next development iteration