Add title and install instructions to all sub-package READMEs

packages/0x.js/README.md

@@ -1,3 +1,6 @@
+0x.js
+-----
+
 ## Installation
 
 0x.js ships as both a [UMD](https://github.com/umdjs/umd) module and a [CommonJS](https://en.wikipedia.org/wiki/CommonJS) package.

packages/assert/README.md

@@ -1 +1,10 @@
+assert
+------
+
 Standard type and schema assertions to be used across all 0x projects and packages
+
+## Install
+
+```bash
+npm install @0xproject/assert --save
+```

packages/json-schemas/README.md

@@ -1,5 +1,14 @@
+json-schemas
+------------
+
 Contains 0x-related json schemas
 
+## Install:
+
+```bash
+npm install @0xproject/json-schemas --save
+```
+
 ## Usage:
 ```
 import {SchemaValidator, ValidatorResult, schemas} from '@0xproject/json-schemas';

packages/tslint-config/README.md

@@ -1,4 +1,10 @@
 tslint-config
------------------------
+-------------
 
 Lint rules related to 0xProject for TSLint.
+
+## Install:
+
+```bash
+npm install @0xproject/tslint-config --save-dev
+```