Add per-NE type evaluation

[jnothman]

Proposed interface: the ability to grep over the mention text or auxiliary data in CoNLL 2003 format.

For example

cne grep --conll eng.testb --ner LOC input.testb.linked

would:

• align the CONLL data in eng.testb with the linked input
• compile a regex 'LOC'
• concatenate (space-delimited) the NER field tokens corresponding to mentions in the linked input
• output those tokens for which the mention matches the regex, in the evaluate format

This can be used to filter over NE type, POS sequence, token text, etc.

[jnothman]

This would need to be run for each system and gold data to compare.

[jnothman]

Solved in #34