Merge pull request #5 from whistlerbrk/master

Fix constant name ; Add to .gitignore
Fixed paths in name tag extractor.
Download Reuters model automatically on install.
Automatically download Reuters models on install.
Fixed decimal point escaping for all segmenters and tokenizers.
Merged :perl tokenizer into :ptb tokenizer.
Fixes in the segmentation and tokenization of quotes.
Fixed typos in language configuration files.
Add support for multiple tag sets.
Add support for French tag set.
Created universalisation module.
Remove debug method conflicting with Rails.
Add support for sentences and phrases with categorizers.
Add support for multiple tag sets.
Removed usage of debug function conflicting with Rails.
Add support for getting keywords on sections and zones.
Show message when skipping download of models for Stanford.
Added self.recursive as a feature of all groups.
Fail instead of warn when trying to process an entity that already has children.
Cosmetical changes.