added legend font-size to set_axis_label_fontsize method
rename method to better capture its purpose
add binary to rate method, and a Gauss kernel helperlein
little changes to warning message
Merge branch 'master' of https://github.com/fabiansinz/pyminions

Conflicts:
	spikes/spiketimes.py
Merge pull request #3 from jgrewe/master

improvement of set_axis_fontsize, add binary to rate converter