Ruby: How do I create a wallet and import an electrum seed using money-tree gem
Create a new wallet in Electrum.  Copy the 'Master Public Key' and pass it to the money-tree gem like this:

require 'money-tree'

@node = MoneyTree::Node.from_bip32("YOUR_MASTER_PUBLIC_KEY")

i = 0
20.times do
  @child = @node.node_for_path "m/0/#{i}"
  puts @child.to_address
  i+= 1
end


This will give you the first 20 child nodes of the first child of the master public key.  These addresses should be the same as your "Receiving" addresses in your Electrum wallet.