Added a mitigation because twitter does not work well with given "since" and "until" dates.

Example: https://twitter.com/search?f=tweets&vertical=default&l=de&lang=en&q=%20metoo%20since%3A2017-12-01%20until%3A2017-12-02
this returns tweets until 2017-11-30 which is not good

Added timedelta to choose the time interval for every request, this speed up the process

Changed script in .travis.yml because of timeout

Fixes #48 and #60

implement issue #53 language selection

and add table with country code

Added dashboard image

fixed typo

Cleaned README file

Deleted the entire elasticearch setup, moved to the wiki.