Reorganized some readmes/docs (#193)

* Added javadocs links both to READMEs and docs

Signed-off-by: Francesco Guardiani <francescoguard@gmail.com>

* Removed old docs of v1 of the sdk

Signed-off-by: Francesco Guardiani <francescoguard@gmail.com>

Author: slinkydeveloper

CHANGELOG.md

@@ -40,17 +40,18 @@ Supported features of the specification:
 
 The [CloudEvents specification](https://github.com/cloudevents/spec) is a vendor-neutral specification for defining the format of event data that is being exchanged between different cloud systems. The specification basically defines an abstract envelope for any event data payload, without knowing specific implementation details of the actual underlying event. The current version of the spec is at `0.3` and it describes a simple event format, which was demonstrated at [KubeCon 2018](https://youtu.be/TZPPjAv12KU) using different _Serverless platforms_, such as [Apache Openwhisk](https://github.com/apache/incubator-openwhisk).
 
-## Java API
+## Documentation
 
-For Maven based projects, use the following to configure the CloudEvents Java SDK:
+Documentation is available at https://cloudevents.github.io/sdk-java/
 
-```xml
-<dependency>
-    <groupId>io.cloudevents</groupId>
-    <artifactId>cloudevents-core</artifactId>
-    <version>2.0.0-milestone1</version>
-</dependency>
-```
+Javadocs are available on [javadoc.io](https://www.javadoc.io):
+
+* [cloudevents-api](https://www.javadoc.io/doc/io.cloudevents/cloudevents-api)
+* [cloudevents-core](https://www.javadoc.io/doc/io.cloudevents/cloudevents-core)
+* [cloudevents-json-jackson](https://www.javadoc.io/doc/io.cloudevents/cloudevents-json-jackson)
+* [cloudevents-http-restful-ws](https://www.javadoc.io/doc/io.cloudevents/cloudevents-http-restful-ws)
+* [cloudevents-http-vertx](https://www.javadoc.io/doc/io.cloudevents/cloudevents-http-vertx)
+* [cloudevents-kafka](https://www.javadoc.io/doc/io.cloudevents/cloudevents-kafka)
 
 ## Community
 
@@ -63,4 +64,4 @@ For Maven based projects, use the following to configure the CloudEvents Java SD
 - Slack: #cloudeventssdk channel under
   [CNCF's Slack workspace](https://slack.cncf.io/).
 - Email: https://lists.cncf.io/g/cncf-cloudevents-sdk
-- Contact for additional information: Fabio José (`@fabiojose` on slack).
+- Contact for additional information: Francesco Guardiani (`@slinkydeveloper` on slack), Fabio José (`@fabiojose` on slack).

README.md

@@ -1,5 +1,7 @@
 # CloudEvents API
 
+[![Javadocs](http://www.javadoc.io/badge/io.cloudevents/cloudevents-api.svg?color=green)](http://www.javadoc.io/doc/io.cloudevents/cloudevents-api)
+
 For Maven based projects, use the following dependency:
 
 ```xml

README_v1.md

@@ -1,5 +1,7 @@
 # CloudEvents Core
 
+[![Javadocs](http://www.javadoc.io/badge/io.cloudevents/cloudevents-core.svg?color=green)](http://www.javadoc.io/doc/io.cloudevents/cloudevents-core)
+
 The base classes, interfaces and low-level APIs to use CloudEvents.
 
 ## How to Use

api/README.md

@@ -1,5 +1,7 @@
 # Json EventFormat implementation with Jackson
 
+[![Javadocs](http://www.javadoc.io/badge/io.cloudevents/cloudevents-json-jackson.svg?color=green)](http://www.javadoc.io/doc/io.cloudevents/cloudevents-json-jackson)
+
 Implementation of [`EventFormat`](../../api/src/main/java/io/cloudevents/format/EventFormat.java) using Jackson.
 
 For Maven:

core/README.md

@@ -1,5 +1,7 @@
 # HTTP Protocol Binding for Jakarta RESTful Web Services
 
+[![Javadocs](http://www.javadoc.io/badge/io.cloudevents/cloudevents-http-restful-ws.svg?color=green)](http://www.javadoc.io/doc/io.cloudevents/cloudevents-http-restful-ws)
+
 For Maven based projects, use the following to configure the CloudEvents Jakarta RESTful Web Services Binding:
 
 ```xml

formats/json-jackson/README.md

@@ -1,5 +1,7 @@
 # HTTP Protocol Binding for Eclipse Vert.x
 
+[![Javadocs](http://www.javadoc.io/badge/io.cloudevents/cloudevents-http-vertx.svg?color=green)](http://www.javadoc.io/doc/io.cloudevents/cloudevents-http-vertx)
+
 For Maven based projects, use the following to configure the CloudEvents Vertx HTTP Transport:
 
 ```xml

http/restful-ws/README.md

@@ -1,5 +1,7 @@
 # Kafka Protocol Binding
 
+[![Javadocs](http://www.javadoc.io/badge/io.cloudevents/cloudevents-kafka.svg?color=green)](http://www.javadoc.io/doc/io.cloudevents/cloudevents-kafka)
+
 For Maven based projects, use the following to configure the [Kafka Protocol Binding](https://github.com/cloudevents/spec/blob/master/kafka-protocol-binding.md):
 
 ```xml