Support for cyrillic characters

Support for unicode letters.

Verison fix

Version fix

Release 0.2.5

* Support for new shapes circle,  irregular rectangle
* Support for styling of links
* Support for newlines in texts
* Centered text on links
* Shaded background for text on links
* Support for click on nodes

Updated readme and changes to the coverage setting on the ci server

Fix for br tags within nodes for new line

Added support for click events on nodes

Removed some logging

Adjusted version