Update icons and README

Author: badsyntax

README.md

@@ -9,8 +9,8 @@ A VS Code extension to manage Entity Framework migrations.
 
 ## Requirements
 
-- The dotnet cli is required
-- A solution (`.sln`) file is required
+- [dotnet sdk](https://dotnet.microsoft.com/download)
+- A solution (`.sln`) file with projects is required
 
 ## Performance
 
@@ -24,48 +24,4 @@ For example:
 
 This extension contributes the following settings:
 
-- `myExtension.enable`: Enable/disable this extension.
-- `myExtension.thing`: Set to `blah` to do something.
-
-## Known Issues
-
-Calling out known issues can help limit users opening duplicate issues against your extension.
-
-## Release Notes
-
-Users appreciate release notes as you update your extension.
-
-### 1.0.0
-
-Initial release of ...
-
-### 1.0.1
-
-Fixed issue #.
-
-### 1.1.0
-
-Added features X, Y, and Z.
-
----
-
-## Following extension guidelines
-
-Ensure that you've read through the extensions guidelines and follow the best practices for creating your extension.
-
-- [Extension Guidelines](https://code.visualstudio.com/api/references/extension-guidelines)
-
-## Working with Markdown
-
-You can author your README using Visual Studio Code. Here are some useful editor keyboard shortcuts:
-
-- Split the editor (`Cmd+\` on macOS or `Ctrl+\` on Windows and Linux).
-- Toggle preview (`Shift+Cmd+V` on macOS or `Shift+Ctrl+V` on Windows and Linux).
-- Press `Ctrl+Space` (Windows, Linux, macOS) to see a list of Markdown snippets.
-
-## For more information
-
-- [Visual Studio Code's Markdown Support](http://code.visualstudio.com/docs/languages/markdown)
-- [Markdown Syntax Reference](https://help.github.com/articles/markdown-basics/)
-
-**Enjoy!**
+- `entityframework.env`: Custom environment vars