Update README

Add setup- and usage instructions.

borsh/README.md

@@ -1,29 +1,32 @@
 # Borsh-as
 
-**borsh-as** is an assemblyscript implementation of the [borsh](borsh.io) serializer.
+**borsh-as** is an assemblyscript implementation of the [borsh](https://borsh.io) serializer.
 
 ## How to use it
 
+Install the package via `yarn add @serial-as/borsh` and add the `--transform @serial-as/transform` flag to your `asc` command.
+
 ```ts
-import { Borsh } from '@serial-as/borsh'
+import { BorshSerializer, BorshDeserializer } from '@serial-as/borsh'
 
 @serializable
 class Pair{
   x: i32 = 0,
   y: i32 = 0
 }
 
-let pair:Pair = {x:1, y:2}
+let pair: Pair = {x:1, y:2}
 
-// serialized is the u8 buffer [0, 0, 0, 1, 0, 0, 0, 2]
-let serialized:ArrayBuffer = Borsh.serialize(object)  
+// `serialized` is the u8 buffer [0, 0, 0, 1, 0, 0, 0, 2]
+let serialized: ArrayBuffer = BorshSerializer.encode(object)  
 
-// decoded is the Pair = {x:1, y:2}
-let decoded:Pair = Borsh.deserialize<Pair>(serialized)  
+// `decoded` is the Pair = {x:1, y:2}
+let decoded: Pair = BorshDeserializer.decode<Pair>(serialized)  
 ```
 
 ## Limitations
+
 Assemblyscript does not have Enums, nor allows to predefine the lenght of an array. Because of this, Borsh-as has the following limitations:
 
 - Does **not** deserialize Enums.
-- Does **not** deserialize fixed-size arrays.
+- Does **not** deserialize fixed-size arrays.