npmignore PST file format.pdf and other unnecessary files

[SheetJSDev]

pst-extractor is awesome! We were able to churn through the entire Enron corpus and extract over 17K spreadsheets fairly quickly.

Issue #1 already covered the extraneous npm dependencies. This issue is about extraneous files in the published module:

https://unpkg.com/pst-extractor@1.2.2/ shows the current listing, and the following files are probably unnecessary (they can be ignored through the .npmignore mechanism):

• PST file format.pdf 7.46MB!
• contributing.md
• .jshintrc
• mocha.opts

[epfromer]

Good to hear you are finding it useful. I'm working on an update that is forthcoming in the next week, and will remove these unnecessary files.

[epfromer]

I just published v1.3.0 which incorporates all your feedback.