Update README.md, Added Documentation

README.md

 # System Monitor Plasmoid
 
+plasmoid to view several items from system Monitor.
+
 ![Preview](images/systemmonitor.png)
 
+## Requirements
+
+Plasma 5 shell (plasma >= 5.7)
+
+## Installation
+
+### From store.kde.org
+
+1.  Click "Plasma 5 Widgets"
+2.  Click "Plasma 5 Monitoring"
+3.  Find and Click on "System Monitor Plasmoid"
+4.  Click "Files"
+5.  Click "Install"
+
+# Configuration
+
+Currently 6 monitor types can be selected.
+
+Each monitor can be displayed as bar Graph, a Circular Graph or a Plot Graph.
+
+Colors for each data Item can be selected on the "Colors" tab.
+
+Fast plotting or smooth plotting (More Cpu intensive) 
+can be selected for the Plot Graph.
+
+There are options to show borders, 
+to show labels (on top or bottem).
+
+What Disks/Partitons to show Space Or acitivity for can be selected in the 
+"Disk Space" or "Disk IO" tabs.
+
+What network devices to show activity for can selected in the network tab.
+
+Different layouts can be optanined by selecting the number of columns/rows
+and layout direction.
+
+if more monitors are selected than what is allowed by Columns/Rows they will
+overlay each other.
+
+# Sample configurations
+
+## Default Configuration
+
 ![Preview](images/systemmonitor-1.png)
 
+## 4 Columns, 1 Row
+
 ![Preview](images/systemmonitor-2.png)
 
+## 2 Columns, 2 Rows
+
 ![Preview](images/systemmonitor-3.png)
 
+## 1 Column, 4 Rows
+
 ![Preview](images/systemmonitor-4.png)
+
+## Adding The Plasmoid to the desktop with different configurations
+
+![Preview](images/systemmonitor.png)
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