added "Author" headers
removed unused imports
fixed docstrings
fixed bug in nltk.tokenize.simple.CharTokenizer
pep-8 variable names in nltk.parse.stanford
use staticmethod when possible for nltk.parse.stanford
added nltk.tokenize.stanford, cf https://github.com/nltk/nltk/issues/558
added the 'options' flag to specify a dictionary of options to the stanford tokenizer
added some demo usages to nltk.tokenize.stanford
removed conversion to byte strings after decoding stdout, as unicode should be returned
converted the demo in nltk.tokenize.stanford into a doctest demo
resolved conflicting import statement