lock on externalId when creating new users
add test for account creation locking
simplify logic flow, fix error message
Using an in-memory index and 0 replicas for elasticsearch when running the unit tests.
allow express to accept POSTs up to the limit we set in nginx
move max upload size setting to config.js
check the output of both user creations when testing for race condition
Added jsdoc and assertion for double failure to account creation locking unit test
Merge branch 'accountCreationLocking'

* accountCreationLocking:
  Added jsdoc and assertion for double failure to account creation locking unit test
  check the output of both user creations when testing for race condition
  simplify logic flow, fix error message
  add test for account creation locking
  lock on externalId when creating new users
simplify the fix to just adding config
Sending string on reCaptcha error.
Merge pull request #666 from Coenego/duplicateuser

Fix for multiple accounts
Merge pull request #665 from stuartf/maxUploadSize

allow express to accept POSTs up to the limit we set in nginx
Bump node-slideshare github revision
Merge branch 'search-failures' of https://github.com/simong/Hilary into search-failures