Added basic eslint configuration.

.eslintignore

@@ -0,0 +1,5 @@
+cms/server/admin/static/jq/*
+cms/server/admin/static/sh/*
+cms/server/static/jq/*
+cms/server/contest/static/js/bootstrap.js
+cmsranking/static/lib/*

.eslintrc.json

@@ -0,0 +1,24 @@
+{
+    "env": {
+        "browser": true,
+        "jquery": true
+    },
+    "extends": "eslint:recommended",
+    "rules": {
+        "indent": ["warn", 4],
+        "linebreak-style": ["error", "unix"],
+        "quotes": ["warn", "double"],
+        "eol-last": ["error"],
+
+        "eqeqeq": ["warn", "smart"],
+        "no-eval": ["error"],
+        "no-extend-native": ["error"],
+        "no-new-func": ["error"],
+        "no-new": ["error"],
+        "no-self-compare": ["error"],
+        "no-useless-escape": ["error"],
+
+        "no-label-var": ["error"],
+        "no-shadow-restricted-names": ["error"]
+    }
+}