Before 0.6.0:
* Rewrite Bonobo server
* Support mesomery
* Some code cleaning
* Update documentation

Later:
* New tools:
	- delocalized bonds,
	- week interactions (e.g. H-bonds),
	- curved arrows (in mechanisms).
	- curved reaction arrows and Tollman's loops,
	- cluster bonds (as in boranes),
	- electron vacancies(?).
* Add preferences
* Zooming
* Scriptability (?)
* Enhance selection
* Add abbreviations in fragments
* Enhance fragments
* Change cursor according to situation
* Update documentation
* More code cleaning
* Remove all bugs ;-)
