Update Readme example and ensure exclude.txt doesn't delete wpe-cache-plugin (#19)

* Updated readme to include a working example of excluding multiple files and a plugin directory.

* Update excude.txt to ensure that the wpe-cache-plugin php file and directory are properly ignored, in recent tests this mu-plugin was being deleted.

* Update README.md

Co-authored-by: Andrew Matthews <[email protected]>

Author: mgratch

README.md

@@ -88,7 +88,7 @@ jobs:
         SRC_PATH: "wp-content/themes/genesis-child-theme/"
         REMOTE_PATH: "wp-content/themes/genesis-child-theme/"
         PHP_LINT: TRUE
-        FLAGS: -azvr --inplace --delete --exclude=".*" --exclude-from=ignorefile.txt
+        FLAGS: -azvr --inplace --delete --exclude=".*"  --exclude=wp-content/mu-plugins/local-plugin --exclude-from=ignorefile.txt
         SCRIPT: "path/yourscript.sh"
         CACHE_CLEAR: TRUE
 ```

exclude.txt

@@ -53,7 +53,6 @@ wp-content/mu-plugins/force-strong-passwords*
 wp-content/mu-plugins/wpengine-common*
 wp-content/mu-plugins/wpe-wp-sign-on-plugin*
 wp-content/mu-plugins/wpe-elasticpress-autosuggest-logger*
-wp-content/mu-plugins/wpe-cache-plugin/*
 wp-content/mu-plugins/wpe-cache-plugin*
 wp-content/mysql.sql