[Suggestion] Support md4 for ionic 3

Hi! I tried the httpntlm library in ionic 3 for my implementation to communicate with an IIS server with NTLM v1. At first it didn't work and I received "md4 is not supported" error. I made the workaround by using another library called 'js-md4' and replace the existing crypto with it for the md4. I think it could be interesting to add this to support applications that are developed using ionic 3 to be able to communicate with a legacy server.

Here are some code change I made locally in my place:

line 10 ntlm.js

var md4 = require('js-md4');

replace the existing md4

function create_NT_hashed_password_v1(password) {
    var buf = new Buffer(password, 'utf16le');
    // var md4 = crypto.createHash('md4');
    // md4(buf);
    return new Buffer(md4.digest(buf));
}

SamDecrock / node-http-ntlm

[Suggestion] Support md4 for ionic 3 #73