Disable an eslint warning that was insane

By default, eslint warns if you use an apostrophe in JSX text (without
wrapping it in a string literal). The `eslint-plugin-react` thread about
it is some typography geeks arguing about the unicode standard, and
reaching the conclusion that apostrophes are actually U+2019. This is
clearly insane, so disable that warning.

jsx-eslint/eslint-plugin-react#894

.eslintrc

@@ -41,7 +41,8 @@
     "no-console": 1,
     "react/prop-types": 0,
     "meteor/audit-argument-checks": 0,
-    "no-case-declarations": 0
+    "no-case-declarations": 0,
+    "react/no-unescaped-entities": 0
   },
   "env": {
     "browser": true,