Autoit fix

Small fix that will (hopefully) fix an issue with the importing of the autoit module.

Check active window

Made script more generic by checking handle for currently active window rather than targeting Scrivener specifically.

Also should fix issue of having multiple version of Scrivener open at once

v2.1: Added useragent

Updated curl request to work with new Zotero security requirements

Scrivener picker

• Updated to include try/catch statement to probe
  -launches Zotero and picker if the application is closed