Allow use of custom delimiter

[adityanatraj]

When extending the Vlad class, one can now choose to set an attribute called delimiter that will be used when reading the csv source.

It is optional and if it is unset, it will be defaulted to using , as the separator.

here are some examples where the delimiter is set:

class Chocula(Vlad):
    source = LocalFile('...')
    validators = {
        'Column A': [],
        'Column B': []
    }
    delimiter = '|'

or

Vlad(source=LocalFile('...'), validators={}, delimiter='|')

[di]

Can you add a Vlad subclass to vladiate/vladiate/examples/vladfile.py which uses this file and the delimiter as well?

[adityanatraj]

updated.

[di]

👍 awesome. Pull request #13, just in time for Halloween, spooky! 🎃 👻