Merge pull request #1 from ProjetDeRechercheSurLecriture/master

Adding logic to check if images exist before displaying them
upgrading dependancies and debugging audio on cordova
adding participants list for https://github.com/ProjetDeRechercheSurLecriture/DyslexDisorthGame/issues/174
using fielddb Participants to display participants dropdown

for https://github.com/ProjetDeRechercheSurLecriture/DyslexDisorthGame/issues/174
encryption fails: Uncaught ReferenceError: Buffer is not defined

Montage isnt able to load the browserified version of FieldDB but instead can load the js files directly since it also uses NPM, however it doesnt seem to have s Browser equivalent of Buffer which Crypto-js is using.
working on using forge instead: https://github.com/digitalbazaar/forge#cipher
cleaning
using fielddb corpus to do database calls
getting participants out of the corpus
using corpus' confidential to decrypt participants
Merge branch 'master' into usingFielddb

for contents of removed cors see https://github.com/cesine/FieldDB/commit/b70bf09deafa67c65c7c289a8406eab9de026e1a

Conflicts:
	core/cors.js
using CORS from fielddb
refusing to run experiments so we can deploy only the start page
Merge pull request #2 from ProjetDeRechercheSurLecriture/usingFielddb

Using fielddb
turning on decrypted mode for participants

for https://github.com/OpenSourceFieldlinguistics/FieldDB/issues/1601
and https://github.com/ProjetDeRechercheSurLecriture/DyslexDisorthGame/pull/175
permitting experiment run
creating sound check component for
https://github.com/ProjetDeRechercheSurLecriture/DyslexDisorthGame/issues/176
sound check extends confirm dialog for

https://github.com/ProjetDeRechercheSurLecriture/DyslexDisorthGame/issues/176
showing sound check before user starts to play the game

for https://github.com/ProjetDeRechercheSurLecriture/DyslexDisorthGame/issues/176
ading audio file for sound check in a loop

fixes https://github.com/ProjetDeRechercheSurLecriture/DyslexDisorthGame/issues/176
added video check (can be used for microphone check)

for https://github.com/ProjetDeRechercheSurLecriture/DyslexDisorthGame/issues/176
permitting video or microphone only sound check for

https://github.com/ProjetDeRechercheSurLecriture/DyslexDisorthGame/issues/176