Readme updates

Author: Ruxton

README.md

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+=== Master Link ===
+
+== Overview ==
+
+Create links that link to multiple storefronts.  Great for music or software that is sold on many digital storefronts
+
+== Installation ==
+
+1. Upload the plugin files to the `/wp-content/plugins/master-link` directory, or install the plugin through the WordPress plugins screen directly.
+1. Activate the plugin through the 'Plugins' screen in WordPress
+1. Use the Settings->Master Link screen to configure the plugin
+1. Use the Master Links section in the sidebar

master-link/readme.txt

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+=== Master Link ===
+Contributors: ruxton
+Donate link: https://ignite.digitalignition.net/code/master-link-wordpress-plugin/
+Tags: links, app store, digital storefronts, deezer, itunes, google play, steam, amazon, soundcloud, youtube 
+Requires at least: 4.3.1
+Tested up to: 4.5.1
+Stable tag: 0.1
+
+Create links that link to multiple storefronts.  Great for music or software that is sold on many digital storefronts
+
+== Description ==
+
+
+== Installation ==
+
+1. Upload the plugin files to the `/wp-content/plugins/master-link` directory, or install the plugin through the WordPress plugins screen directly.
+1. Activate the plugin through the 'Plugins' screen in WordPress
+1. Use the Settings->Master Link screen to configure the plugin
+1. Use the Master Links section in the sidebar
+
+== Changelog ==
+
+= 0.1 =
+* Initial release