Fix Case-sensitive email handling. Thanks to nztqa ! Closes #675

.gitmodules

@@ -1,3 +1,7 @@
 [submodule "packages/kadira:flow-router"]
 	path = packages/kadira:flow-router
 	url = https://github.com/wekan/flow-router.git
+
+[submodule "packages/useraccounts:core"]
+	path = packages/useraccounts:core
+	url = https://github.com/meteor-useraccounts/core.git

.meteor/packages

@@ -31,7 +31,6 @@ mquandalle:collection-mutations
 accounts-password@1.3.5
 kenton:accounts-sandstorm
 service-configuration@1.0.11
-useraccounts:core
 useraccounts:unstyled
 useraccounts:flow-routing
 email@1.2.0