update readme .travis.yml

Author: daviddias

.travis.yml

@@ -4,6 +4,10 @@ node_js:
   - '5'
   - stable
 
+# always use npm latest
+before_install:
+  - npm i -g npm
+
 addons:
   firefox: 'latest'
 

README.md

@@ -1,13 +1,120 @@
-ipfs-unixfs
-===========
+ipfs-unixfs JavaScript Implementation
+=====================================
 
 [![](https://img.shields.io/badge/made%20by-Protocol%20Labs-blue.svg?style=flat-square)](http://ipn.io)
-[[![](https://img.shields.io/badge/freenode-%23ipfs-blue.svg?style=flat-square)](http://webchat.freenode.net/?channels=%23ipfs)
-[![Build Status](https://travis-ci.org/ipfs/js-ipfs-unixfs.svg?style=flat-square)](https://travis-ci.org/ipfs/js-ipfs-unixfs)
+[![](https://img.shields.io/badge/freenode-%23ipfs-blue.svg?style=flat-square)](http://webchat.freenode.net/?channels=%23ipfs)
+[![Build Status](https://travis-ci.org/ipfs/js-ipfs-unixfs.svg?style=flat-square&branch=master)](https://travis-ci.org/ipfs/js-ipfs-unixfs)
 ![](https://img.shields.io/badge/coverage-%3F%25-yellow.svg?style=flat-square)
 [![Dependency Status](https://david-dm.org/ipfs/js-ipfs-unixfs.svg?style=flat-square)](https://david-dm.org/ipfs/js-ipfs-unixfs)
 [![js-standard-style](https://img.shields.io/badge/code%20style-standard-brightgreen.svg?style=flat-square)](https://github.com/feross/standard)
 
 > JavaScript implementation of IPFS' unixfs (a Unix FileSystem representation on top of a MerkleDAG)
 
+[The unixfs spec can be found inside the ipfs/specs repository](http://github.com/ipfs/specs)
+
+# Installation
+
+## npm
+
+```sh
+> npm i ipfs-unixfs
+```
+
+## Use in Node.js
+
+```JavaScript
+var Unixfs = require('ipfs-unixfs')
+```
+
+## Use in a browser with browserify, webpack or any other bundler
+
+The code published to npm that gets loaded on require is in fact a ES5 transpiled version with the right shims added. This means that you can require it and use with your favourite bundler without having to adjust asset management process.
+
+```JavaScript
+var Unixfs = require('ipfs-unixfs')
+```
+
+## Use in a browser Using a script tag
+
+Loading this module through a script tag will make the `Unixfs` obj available in the global namespace.
+
+```html
+<script src="URL/"></script>
+```
+
 # Usage
+
+## Examples
+
+#### Create a file composed by several blocks
+
+```JavaScript
+var data = new UnixFS('file')
+data.addBlockSize(256) // add the size of each block
+data.addBlockSize(256)
+// ...
+```
+
+#### Create a directory that contains several files
+
+Creating a directory that contains several files is achieve by creating a unixfs element that identifies a MerkleDAG node as a directory. The links of that MerkleDAG node are the files that are contained in this directory.
+
+```JavaScript
+var data = new Unixfs('directory')
+```
+
+## API
+
+#### unixfs Data Structure
+
+```protobuf
+message Data {
+  enum DataType {
+    Raw = 0;
+    Directory = 1;
+    File = 2;
+    Metadata = 3;
+    Symlink = 4;
+  }
+
+  required DataType Type = 1;
+  optional bytes Data = 2;
+  optional uint64 filesize = 3;
+  repeated uint64 blocksizes = 4;
+}
+
+message Metadata {
+  required string MimeType = 1;
+}
+```
+
+#### create an unixfs Data element
+
+```JavaScript
+var data = new UnixFS(<type>, [<content>])
+```
+
+Type can be: `['raw', 'directory', 'file', 'metadata', 'symlink']`
+
+#### add and remove a block size to the block size list
+
+```JavaScript
+data.addBlockSize(<size in bytes>)
+```
+
+```JavaScript
+data.removeBlockSize(<index>)
+```
+
+#### get total fileSize
+
+```JavaScript
+data.fileSize() // => size in bytes
+```
+
+#### marshal and unmarshal
+
+```
+var marsheled = data.marshal()
+var unmarsheled = Unixfs.unmarshal(marsheled)
+```