examples: Add ToC to README
This package contains code samples that interact with the [Flow Emulator](https://github.com/onflow/flow/blob/master/docs/emulator.md).
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+- [Running the emulator with the Flow CLI](#running-the-emulator-with-the-flow-cli)
+ - [Installation](#installation)
+ - [Starting the server](#starting-the-server)
+- [Running the examples](#running-the-examples)
+ - [Create Account](#create-account)
+ - [Add Account Key](#add-account-key)
+ - [Deploy Contract](#deploy-contract)
+ - [Query Events](#query-events)
+ - [Transaction Signing](#transaction-signing)
+ - [Single Party, Single Signature](#single-party-single-signature)
+ - [Single Party, Multiple Signatures](#single-party-multiple-signatures)
+ - [Multiple Parties](#multiple-parties)
+ - [Multiple Parties, Multiple Signatures](#multiple-parties-multiple-signatures)
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## Running the emulator with the Flow CLI
The emulator is bundled with the [Flow CLI](https://github.com/onflow/flow/blob/master/docs/cli.md), a command-line interface for working with Flow.
