Merge branch 'development' into improvement/addCustomTslintRules

* development:
  fix style errors
  Fix circular dependency
  Add my profile image to images
  Add myself to about page
  Add dogfood configs to website
  Change minimum Node version to 6.12
  Document Node.js version requirement and add it to package.json

packages/assert/package.json

@@ -1,6 +1,9 @@
 {
     "name": "@0xproject/assert",
     "version": "0.2.9",
+    "engines": {
+        "node" : ">=6.12"
+    },
     "description": "Provides a standard way of performing type and schema validation across 0x projects",
     "main": "lib/src/index.js",
     "types": "lib/src/index.d.ts",