Add PHI7 index

[kylepjohnson]

This is an easy job. Someone just needs to extend what I've done for PHI5 and TLG.

https://github.com/kylepjohnson/cltk/blob/master/cltk/corpus/utils/formatter.py

[coderbhupendra]

@kylepjohnson i did this but i dont know if this is what you wanted, please see the gist:
https://gist.github.com/coderbhupendra/6fa0b52e4cc3d8869344

I have just copy pasted code of phi5 for phi7, and made assemble_phi7_works_filepaths() and assemble_phi7_author_filepaths() in formatter.py . I have used same same punctuation for phi7 ,if rm_period is true (line #132). And please uncomment the line #17 ,#18 i.e importing PHI7_WORKS_INDEX.
One important thing do i need to make phi7_index.py like phi5_index.pyfrom somewhere, please tell me i will do it.

[kylepjohnson]

Hi @coderbhupendra , I appreciate the hustle, but please hold off on this one. It's not super hard, however we need a Greek and Latin language expert to work on this.

[D-K-E]

@kylepjohnson Anything I can help with the greek side of things ?

[kylepjohnson]

@D-K-E Im just getting back from a long vacation. Yes, if you find a copy of the PHI7, take a look at the indices in it. They're really ugly, but making a modern index to these would be really valuable.