Adding await keyword (Fixes #181)

Author: StartAutomating

docs/Await.md

@@ -0,0 +1,42 @@
+
+Await
+-----
+### Synopsis
+awaits asynchronous operations
+
+---
+### Description
+
+awaits the result of a task.
+
+---
+### Examples
+#### EXAMPLE 1
+```PowerShell
+PipeScript -ScriptBlock {
+    await $Websocket.SendAsync($SendSegment, 'Binary', $true, [Threading.CancellationToken]::new($false))
+}
+```
+
+#### EXAMPLE 2
+```PowerShell
+PipeScript -ScriptBlock {
+    $receiveResult = await $Websocket.ReceiveAsync($receiveSegment, [Threading.CancellationToken]::new($false))
+}
+```
+
+---
+### Parameters
+#### **CommandAst**
+
+|Type              |Requried|Postion|PipelineInput |
+|------------------|--------|-------|--------------|
+|```[CommandAst]```|true    |1      |true (ByValue)|
+---
+### Syntax
+```PowerShell
+Await [-CommandAst] <CommandAst> [<CommonParameters>]
+```
+---
+
+