Fix cargo workspace issues

Symlink README from root directory to eventsource-client/README.md since crates.io
won't accept a README that isn't in the package directory.

Add .ldrelease scripts since Releaser doesn't yet support workspaces.

Author: cwaldren-ld

.ldrelease/build.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+set -ue
+
+cd eventsource-client
+cargo package

.ldrelease/publish-dry-run.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+set -ue
+
+echo "DRY RUN: not publishing to crates.io, only copying crate"
+cp ./target/package/*.crate "${LD_RELEASE_ARTIFACTS_DIR}"

.ldrelease/publish.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+set -ue
+
+export CARGO_REGISTRY_TOKEN="$(cat "${LD_RELEASE_SECRETS_DIR}/rust_cratesio_api_token")"
+
+cd eventsource-client
+cargo publish

.ldrelease/update-version.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+set -ue
+
+sed -i "/^version\b/c version = \"${LD_RELEASE_VERSION}\"" ./eventsource-client/Cargo.toml

README.md

@@ -0,0 +1 @@
+eventsource-client/README.md

README.md

@@ -0,0 +1,46 @@
+# eventsource-client
+
+Client for the [Server-Sent Events] protocol (aka [EventSource]).
+
+[Server-Sent Events]: https://html.spec.whatwg.org/multipage/server-sent-events.html
+[EventSource]: https://developer.mozilla.org/en-US/docs/Web/API/EventSource
+
+## Requirements
+
+Requires tokio.
+
+## Usage
+
+Example that just prints the type of each event received:
+
+```rust
+use eventsource_client::Client;
+
+let mut client = Client::for_url("https://example.com/stream")?
+    .header("Authorization", "Basic username:password")?
+    .build();
+
+client.stream()
+    .for_each(|event| {
+      Ok(println!("got an event: {}", event.event_type))
+    })
+    .map_err(|e| println!("error streaming events: {:?}", e));
+```
+
+(Some boilerplate omitted for clarity; see [examples directory] for complete,
+working code.)
+
+[examples directory]: ../../tree/master/examples
+
+## Features
+
+* tokio-based streaming client.
+* Supports setting custom headers on the HTTP request (e.g. for endpoints
+  requiring authorization).
+* Retry for failed connections.
+* Reconnection if connection is interrupted, with exponential backoff.
+
+## Stability
+
+Early stage release for feedback purposes. May contain bugs or performance
+issues. API subject to change.