Move from using lerna multi-package commands to wsrun, update README's accordingly

packages/sol-resolver/README.md

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+## @0xproject/sol-resolver
+
+A Solidity import resolver used by [sol-compiler](https://github.com/0xProject/0x-monorepo/tree/development/packages/sol-compiler).
+
+## Installation
+
+```bash
+yarn add @0xproject/sol-resolver
+```
+
+**Import**
+
+```javascript
+import { Resolver } from '@0xproject/sol-resolver';
+```
+
+or
+
+```javascript
+var Resolver = require('@0xproject/sol-resolver').Resolver;
+```
+
+## Contributing
+
+We welcome improvements and fixes from the wider community! To report bugs within this package, please create an issue in this repository.
+
+Please read our [contribution guidelines](../../CONTRIBUTING.md) before getting started.
+
+### Install dependencies
+
+If you don't have yarn workspaces enabled (Yarn < v1.0) - enable them:
+
+```bash
+yarn config set workspaces-experimental true
+```
+
+Then install dependencies
+
+```bash
+yarn install
+```
+
+### Build
+
+To build this package and all other monorepo packages that it depends on, run the following from the monorepo root directory:
+
+```bash
+PKG=@0xproject/sol-resolver yarn build
+```
+
+Or continuously rebuild on change:
+
+```bash
+PKG=@0xproject/sol-resolver yarn watch
+```
+
+### Clean
+
+```bash
+yarn clean
+```
+
+### Lint
+
+```bash
+yarn lint
+```