Add rakudobrew rehash command
Add rakudobrew rehash command

I found that when using Rakudobrew bailador commadn line tool was not available untill after I used the "rakudobrew rehash" command.
ufobat/Bailador,Bailador/Bailador,tadzik/Bailador,ufobat/Bailador,tadzik/Bailador,Bailador/Bailador