Clean up plugin READMEs and a few plugins

- fasd
- history
- mercurial
- pylint
- repo
- yii2

plugins/encode64/README.md

@@ -1,6 +1,12 @@
 # encode64
 
-Alias plugin for encoding or decoding using `base64` command
+Alias plugin for encoding or decoding using `base64` command.
+
+To use it, add `encode64` to the plugins array in your zshrc file:
+
+```zsh
+plugins=(... encode64)
+```
 
 ## Functions and Aliases
 
@@ -9,23 +15,6 @@ Alias plugin for encoding or decoding using `base64` command
 | `encode64` | `e64` | Encodes given data to base64   |
 | `decode64` | `d64` | Decodes given data from base64 |
 
-## Enabling plugin
-
-1. Edit your `.zshrc` file and add `encode64` to the list of plugins:
-
-   ```sh
-   plugins=(
-     # ...other enabled plugins
-     encode64
-   )
-   ```
-
-2. Restart your terminal session or restart the shell:
-
-   ```sh
-   exec zsh
-   ```
-
 ## Usage and examples
 
 ### Encoding