Merge pull request #7 from mihi-tr/viz

First version of new d3 visualization based on the data returned by the server.
Modified inserting
Merge branch 'master' of https://github.com/tgrez/sejm-ngram
first REST JSON response from database - backend is working
Some poms are java 1.6 now
Merge pull request #8 from mihi-tr/viz

select bar - first version seems to work.
updated README.md
improved ResponseBuilder
Merge branch 'master' of github.com:tgrez/sejm-ngram
Merge pull request #9 from mihi-tr/viz

Initial design
aa
Test data
Dates
Merge branch 'master' of https://github.com/tgrez/sejm-ngram into viz
adding label text