A runnable command

- Added backup sub-command
- Added better parsing for config file
- Basis for notifications, no running after a command yet
- Updated docs and added License

backy.go

@@ -0,0 +1,9 @@
+package main
+
+import (
+	"git.andrewnw.xyz/CyberShell/backy/cmd"
+)
+
+func main() {
+	cmd.Execute()
+}