Update travis to not pull aws-sdk-js-apis
Initial commit of AWS.S3.ManagedUpload

Usage:

```js
var fs = require('fs');
var zlib = require('zlib');

var body = fs.createReadStream('bigfile').pipe(zlib.createGzip());
var s3obj = new AWS.S3({params: {Bucket: 'myBucket', Key: 'myKey'}});
s3obj.upload().
  on('httpUploadProgress', function(evt) { console.log(evt); }).
  send({Body: body}, function(err, data) {
    console.log(err, data)
  });
```

Or via the ManagedUpload class:

```js
var fs = require('fs');
var zlib = require('zlib');

var params = {
  Bucket: 'myBucket',
  Key: 'myKey',
  Body: fs.createReadStream('bigfile').pipe(zlib.createGzip())
}

var upload = new AWS.S3.ManagedUpload();
upload.on('httpUploadProgress', function(evt) { console.log(evt); });
upload.send(params, function(err, data) { console.log(err, data) });
```

References #135
Use generalized require() for browser support.
Update upload logic and add tests