add bash completion

completions/bash/tiempo-autocomplete.bash

@@ -0,0 +1,16 @@
+#!/bin/bash
+_tiempo ()
+{
+  cur="${COMP_WORDS[COMP_CWORD]}"
+  cmd="${COMP_WORDS[1]}"
+
+  if [[ ( $cmd = s* || $cmd = d* ) && "$COMP_CWORD" = 2 ]]; then
+    COMPREPLY=($(compgen -W "$(echo "select distinct sheet from entries where sheet not like '\_%';" | z b)" $cur))
+    return
+  elif [[ "$COMP_CWORD" = 1 ]]; then
+    CMDS="archive backend configure display edit in kill list now out resume sheet week month"
+    COMPREPLY=($(compgen -W "$CMDS" $cur))
+  fi
+}
+
+complete -F _tiempo 'z'