Small typo in README

[NMO13]

I think there is a minor typo:

options = {
    'page-size': 'Letter',
    'margin-top': '0.75in',
    'margin-right': '0.75in',
    'margin-bottom': '0.75in',
    'margin-left': '0.75in',
    'encoding': "UTF-8",
    'custom-header' : [
    	('Accept-Encoding', 'gzip')
    ]
    'cookie': [
    	('cookie-name1', 'cookie-value1'),
    	('cookie-name2', 'cookie-value2'),
    ],
    'no-outline': None
}

pdfkit.from_url('http://google.com', 'out.pdf', options=options)

should be

options = {
    'page-size': 'Letter',
    'margin-top': '0.75in',
    'margin-right': '0.75in',
    'margin-bottom': '0.75in',
    'margin-left': '0.75in',
    'encoding': "UTF-8",
    'custom-header' : [
    	('Accept-Encoding', 'gzip')
    ],
    'cookie': [
    	('cookie-name1', 'cookie-value1'),
    	('cookie-name2', 'cookie-value2'),
    ],
    'no-outline': None
}

pdfkit.from_url('http://google.com', 'out.pdf', options=options)

[JazzCore]

Should be fixed in master, thanks