>Functions to convert bits from different base called
   <code>convertbits/3</code> and <code>convertbits/4</code> are also provided.</p>
  
   <pre>   {ok,[14,17,18,23,6,29,0]}
      = bech32:convertbits("test", 8, 5).
  
   {ok, [116,101,115,116,0]}
      = bech32:convertbits([14,17,18,23,6,29,0], 5, 8).
  
   {ok,[14,17,18,23,6,29]}
      = bech32:convertbits("test", 8, 5, [{padding, false}]).
  
   {ok,"test"}
      = bech32:convertbits([14,17,18,23,6,29], 5, 8, [{padding, true}]).</pre>
  
<h2><a name=