Py2 is mixed with Py3

[jabbalaci]

In the README example, Python 2 is mixed with Python 3:

@task()
def clean():
    '''Clean build directory.'''
    print 'Cleaning build directory...'

@task()
def _copy_resources():
    '''Copy resource files. This is a private task. "pynt -l" will not list this'''
    print('Copying resource files')

I mean the prints. Unify them for Python 3.