bash completion script for bee added

contrib/bee-completion.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+_bee_completion()
+{
+    COMPREPLY=()
+
+    cur="${COMP_WORDS[COMP_CWORD]}"
+    prev="${COMP_WORDS[COMP_CWORD-1]}"
+
+    options="init install remove check query list"
+    ls=$(ls $pwd)
+
+    if [ "${prev}" = "bee" ]; then
+        COMPREPLY=($(compgen -W "${options} ${ls}" -- ${cur}) )
+        return 0
+    fi
+
+    packages=$(bee list -a)
+    COMPREPLY=($(compgen -W "${packages} ${ls}" -- ${cur}) )
+
+    return 0
+}
+
+complete -F _bee_completion bee