Updated to use TextBlob for POS tagging

NLTK POS tagging is slower than TextBlob. Also updated common
substitutions to add more items.
Updates comment permalink

And other minor changes.
Updated grammar and tweaked chunking logic
Cleaned up other load_attributes logic
Ignore text files
Added logic to handle prepositional phrases
Updated ignore_subs to add items
Tweaked parsing grammar

Sometimes, adjectives occur after nouns or default POS tagger tags
nouns as adjectives. Tweaked parsing grammar to handle this.
Refactoring and other minor changes

Changed chunk structure to include prep_noun_phrase.
Updated substitutions
Refactoring and other minor changes
Updated grammar and substitutions
Prettied up printing user data
Additional fields in subreddits CSV
Auto-categorize subreddits
Fixed minor bug in gender extraction
Fixed regex in family member extraction
Convert chunks to lowercase after POS tagging
Ignore results directory
Added default subreddit indicator

Also, derive ignore_comments_subs from data instead  of hardcoded list.