[RIS] Fix non-standard Y1 date handling
Update T&F tests
[AEA Web] Fix multiples list
Adjust priorities for recent translators
As per https://github.com/aurimasv/translators/commit/5b4ef451a9c3c14fa9b2b8d5bce37a8bf7c1a3f2
[beck-online] Adjust target regexp to allow proxy detection
[Google Books] Use relative URLs
fix WSJ to new default URL, some minor tweaks
add DOIs to ERIC
Delete dataMode "block" and "line"

 * These values are no longer needed (and are therefore somehow deprecated).
 * Deleted all occurrencies of block or line as dataMode
Merge pull request #828 from zuphilip/data-mode

Delete dataMode "block" and "line"
[Flickr] Don't attempt to download photos if downloading is disabled
(disabled by the author in Flickr that is)
[RIS] Account for possible \u2028 \u2029 characters
[RIS} Actually detect \u2029.
See 891ea29335a52f2c12c6f0f431a6063c88908f06
Thanks @zuphilip
[JSTOR] Modernize plus a few tweaks.
* General code update to make it easier to follow
* Remove betaSearch support (discontinued by JSTOR)
* Validate DOIs using doiRA tool, which would maintain DOIs registered with non-CrossRef service and is quite lightweight
* Test updates are mostly just rearrangements. A few DOIs got changed by JSTOR.
* Add support for /info URLs re https://forums.zotero.org/discussion/43056/saving-jstor-items/ (as displayed after following a DOI)
* Remove `/\/i\d/` test for search results, since it seems very general and we don't have a test case
[DOI] Tighten up DOI detection by disallowing quotes
Re http://www.jstor.org/stable/2461927 picking up DOIs in noscript tag (because apparently everything in noscript is text?) as 10.2307/2461927">Export etc.
The DOI on that page is still invalid as of this writing, but now we grab it correctly.
[JSTOR] Use CrossRef API to check DOI validity