Merge pull request #1 from fdb/master.

Please add this .gitignore file.
added README.txt
Merge branch 'master' of github.com:clips/pattern
url.download() throttle
pattern.en.parser.brill with Lexicon class.
This abstraction allows other modules (e.g., pattern.nl or pattern.de) to inherit from the English parser and define their own Brill language models.
improved tokenizer in pattern.en.parser
pattern.nl with Dutch noun inflection, verb conjugation and parser (based on Brill-NL by Jeroen Geertzen).
setup.py bug fix
minor improvements to Dutch parser
Clustering algorithms, faster cosine similarity.
- stemmer can be custom function
- flat list functions: tf_idf(), l2_norm(). cosine_similarity(), kmeans(), hierarchical()
- LSA modified Document.vector in-place, check Corpus.reduced=True.
- faster cosine similarity: 16x
- Corpus.cluster() with k-means or hierarchical clustering.
minor bug fix for graph export (for nodes without label)
Improvements to Corpus.reduce() LSA.
Improvements to Corpus.reduce() LSA.
k-means for sparse vectors w/ with triangle inequality (Elkan lemma 1)
1.9 release
updated pattern.vector examples
removed some debug printing from 1.9
relaxed triangle equality for k-means
removed thread class
self_closing=[] optional parameter for pattern.web.Document