Updated readme to describe first version functionality

Author: gsboylan

README.md

@@ -1 +1,31 @@
-# Sublime-BackgroundColorEdit
+# BackgroundColorEdit
+
+Allows you to quickly and easily change only the background color of the currently active theme in Sublime Text 3.
+
+Currenntly only works with themes installed via [Colorsublime](colorsublime.com/).
+
+## Requirements
+
+ - Sublime Text 3
+ - Colorsublime
+
+## Installation
+
+### Manual
+
+Clone this repo to your Sublime Text 'Packages' directory, which can be found via `Preferences > Browse Packages`.
+
+### Via Package Control
+
+*Coming soon.*
+
+## Usage
+
+1. Open the command palette (`ctrl+shift+p` or `cmd+shift+p` by default)
+2. Search for `BackgroundColorEdit: Set Background Color`
+3. Type a hex color code in the prompt provided and press enter to apply.
+4. Alternately, search for `BackgroundColorEdit: Show Background Color` to print out the active theme's current background color to the status bar.
+
+## Resetting the background color
+
+Simply reinstall the theme in Colorsublime.