docs: Fixes #275. Update Readme package names and links (#286)

* docs: Fixes #275. Update Readme package names and links

* Update README.md

README.md

@@ -17,16 +17,17 @@ This library provides a clean wrapper around all the methods exposed by a Polkad
 
 The API is split up into a number of internal packages -
 
-- [@polkadot/api](packages/api/) The low-level base API library
+- [@polkadot/api](packages/api/) The API library, providing both Promise and RxJS Observable-based interfaces
-- [@polkadot/api-codec](packages/api-codec/) Codecs for all Polkadot primitives
+- [@polkadot/api-observable](packages/api-observable/) A combination Observable wrapper around [@polkadot/api/rx](packages/api/rs)
-- [@polkadot/api-rx](packages/api-rx/) A RxJs Observable wrapper around the API
+- [@polkadot/rpc-core](packages/rpc-core/) Wrapper around all methods exposed by a Polkadot network client
-- [@polkadot/api-provider](packages/api-provider/) Providers for connecting
+- [@polkadot/rpc-provider](packages/rpc-provider/) Providers for connecting to nodes, including WebSockets and Http
 
 Type definitions for interfaces as exposed by Polkadot & Substrate clients -
 
 - [@polkadot/extrinsics](packages/type-extrinsics/) Base extrinsic definitions & codecs
 - [@polkadot/jsonrpc](packages/type-jsonrpc/) Definitions for JSONRPC endpoints
 - [@polkadot/storage](packages/type-storage/) Definitions for storage entries
+- [@polkadot/types](packages/types/) Codecs for all Polkadot primitives
 
 ## development
 
@@ -46,4 +47,4 @@ To get started -
 
 ## tutorials
 
-Looking for tutorials to get started? Look at [examples](https://polkadot.js.org/api/examples/) for guides on how to use the API.
+Looking for tutorials to get started? Look at [examples](https://polkadot.js.org/api/examples/promise/) for guides on how to use the API.

packages/type-extrinsics/README.md

@@ -1 +1,3 @@
 # @polkadot/extrinsics
+
+Base extrinsic definitions & codecs