README: cache no longer mandatory
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							@@ -96,19 +96,17 @@ For example: `python2.7 PATH/TO/MORSS/morss.py http://feeds.bbci.co.uk/news/rss.
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Quickly get a full-text feed:
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```python
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>>> import morss
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>>> url = 'http://feeds.bbci.co.uk/news/rss.xml'
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>>> cache = '/tmp/morss-cache' # cache folder, needs write permission
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>>> xml_string = morss.process(url, cache)
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>>> xml_string = morss.process('http://feeds.bbci.co.uk/news/rss.xml')
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>>> xml_string[:50]
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"<?xml version='1.0' encoding='UTF-8'?>\n<?xml-style"
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```
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Passing arguments:
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Using cache and passing arguments:
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```python
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>>> import morss
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>>> url = 'http://feeds.bbci.co.uk/news/rss.xml'
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>>> cache = '/tmp/morss-cache'
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>>> options = ['csv', 'md']
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>>> cache = '/tmp/morss-cache' # cache folder, needs write permission
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>>> options = ['csv', 'md'] # simple list()
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>>> xml_string = morss.process(url, cache, options)
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>>> xml_string[:50]
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'{"title": "BBC News - Home", "desc": "The latest s'
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