PySpike v0.6:
    * Support for computing spike directionality and spike train order

PySpike v0.5:
	* First beta release
	* Python 2.6 support removed
	* Python 3.6 support added
	* several bugfixes

PySpike v0.4:
	* Python 3 support (thanks to Igor Gnatenko)
	* list interface to SpikeTrain class
	* disable_backend_warning property
	* several bugfixes

PySpike v0.3:
	* addition of __version__ attribute
	* restructured docs, Readme now only contains basic examples
	* performance improvements by introducing specific distance functions
	* performance improvements for multivariate profiles by using recursive
	approach
	* new example: performance.py
	* consistent treatment of empty spike trains
	* new example: profiles.py
	* additional functionality: pwc and pwl function classes can now return
	function values at given time(s)

PySpike v0.2:

	* introduction of SpikeTrain class. Breaking interface change of
	distance functions
	* added max_tau parameter to SPIKE-Synchronization
	* added psth function
	* restructured modules, separate files for different distance measures
	* Bugfix for selective multivariate distance
	* added spike generation function
