Pyspike

* Support Adaptive versions of distances (Minimum Relevant Time Scale)
* Support Rate Independent Adaptive spike distance
* New function to correct errors in imported SpikeTrain list [reconcile_spike_trains()]
* Avoid problems with np.float deprecation

* Python 3.10 compatible
* Dropped support for Python2
* Small fixes in tests
* Fixed documentation links

* Support for computing spike directionality and spike train order

* First beta release
* Python 2.6 support removed
* Python 3.6 support added
* several bugfixes

* Python 3 support (thanks to Igor Gnatenko)
* list interface to SpikeTrain class
* disable_backend_warning property
* several bugfixes

* 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)