rough EditLine draft for REPL

currently echo double of each char typed
change to UTF8 wide char reading from EditLine

read wide chars from stdin
comment out unused file descriptor
Revert "change to UTF8 wide char reading from EditLine"

This reverts commit 48ef0b7ef4d2e6621ccfabb06049e73ddaea6e2d.
Merge pull request #15 from sventech/master

rough EditLine implementation for REPL