strip spaces from the name of classes in affinity.csv or classes.csv

[marjanfamili]

I created a new dataset and started getting a lot of errors, number of data being zero, etc. Turns out I formed the classes.csv and affinity.csv as follows:

classes.csv item1, item2

affinity.csv item1, item2 1, -1 -1,1

because both have a space behind item2 it doesn't through the error but it also doesn't recognise the name in the list of data

[jolaem]

Related to #63

[marjanfamili]

with open(self.filename, 'r') as f: reader = csv.reader(f, delimiter=',', quoting=csv.QUOTE_NONE) return [[x.strip() for x in row] for row in reader]

[marjanfamili]

Save colours in a df for each class and call from data frame