Created CLI_Usage (markdown)

CLI_Usage.md

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+## Apprise CLI
+This small tool wraps the apprise python library to allow individuals such as Developers, DevOps, and Administrators to send notifications from the command line.
+
+Apprise in it's most basic form requires that you provide it a message and an Apprise URL which contains enough information to send the notification with.
+```bash
+# Set a notification to a hotmail (email) account:
+python apprise --body="My Message" mailto://user:password@hotmail.com
+```
+
+If you don't specify a **--body** (**-b**) then Apprise reads from **stdin** instead:
+```bash
+# without a --body, you can use a pipe | to redirect output
+# into you're notification:
+uptime | python apprise mailto://user:password@hotmail.com
+```
+
+There is no limit to the number of services you want to notify, just keep adding/chaining them one after another:
+```bash
+# Set a notification to a yahoo email account, Slack, and a Kodi Server:
+python apprise --body="Notify more than one service" \
+   mailto://user:password@yahoo.com \
+   slack://token_a/token_b/token_c \
+   kodi://example.com
+```
+