[Utilities] add cleanISSN
Merge pull request #234 from aurimasv/cleanISSN

[Utilities] add cleanISSN
Update citeproc-js to 1.0.422
[Zotero_TranslatorTester] Move _generateDiff  and _compare out of prototype
Merge pull request #236 from aurimasv/generateDiff

[Zotero_TranslatorTester] Move _generateDiff  and _compare out of prototype
Better MIME type detection of Office files

For at least one Windows user, a .docx file was being interpreted as
text/plain. Instead of relying entirely on the system, hard-code some
extensions we know. (More can be added.)

Also:

- Determine MIME type when opening files instead of using stored type,
  since we might have gotten smarter
Use eraseByURI() instead of eraseByURIPrefix(), and fix params
Detect CAPTCHA
Merge branch '3.0'

Conflicts:
	chrome/content/zotero/recognizePDF.js
	chrome/content/zotero/zoteroPane.js