<commit_before># convnetjs reference implementation

I'm using (since 13th March 2015) convnetjs as a reference implementation, to double-check
my calculations, since convnetjs:
<commit_msg>add convnetjs url<commit_after># convnetjs reference implementation

I'm using (since 13th March 2015) [convnetjs](https://github.com/karpathy/convnetjs) as a reference implementation, to double-check
my calculations, since convnetjs:

{'fraction_non_alphanumeric': 0.07529411764705882, 'fraction_numerical': 0.02823529411764706, 'mean_word_length': 6.888888888888889, 'pattern_counts': {'":': 0, '<': 3, '<?xml version=': 0, '>': 3, 'https://': 1, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '6528386', 'n_tokens_mistral': 130, 'n_tokens_neox': 115, 'n_words': 44}