add S3 upload and remove functionality

lib/imager.js

@@ -3,8 +3,7 @@ var gm = require('gm').subClass({ imageMagick: true })
   , path = require('path')
   , mime = require('mime')
   , cloudfiles = require('cloudfiles')
-  , http  = require('http')
-  , url   = require('url')
+  , knox = require('knox')
   , async = require('async')
   , _ = require('underscore')
 
@@ -218,6 +217,19 @@ Imager.prototype.pushToRackspace = function (file, remoteFile, filename, type, c
 }
 
 
+Imager.prototype.pushToS3 = function (file, remoteFile, filename, type, cb) {
+  var self = this
+    , client = knox.createClient(this.config['storage'][this.storage])
+
+  client.putFile(file, remoteFile, function (err, res) {
+    if (err) return cb(err)
+    if (self.config.debug) console.log(remoteFile + ' uploaded')
+    self.cdnUri = 'http://' + client.endpoint
+    cb(err, filename)
+  })
+}
+
+
 Imager.prototype.remove = function (files, callback, variant) {
   if (!variant && !this.config.variants.default)
     throw new Error('Please specify a proper variant to remove the files')
@@ -300,3 +312,16 @@ Imager.prototype.removeFromRackspace = function (file, preset, cb) {
     })
   })
 }
+
+
+Imager.prototype.removeFromS3 = function (file, preset, cb) {
+  var self = this
+    , client = knox.createClient(this.config['storage'][this.storage])
+    , remoteFile = preset + '_' + file
+
+  client.deleteFile(remoteFile, function(err, res){
+    if (self.config.debug) console.log(remoteFile + ' removed')
+    if (err) console.log(err)
+    cb(err)
+  })
+}