Remove autoupdate using polling method (#83)

* Use a POST request to trigger update.

The updater code has been moved to its own package.
The scheduler has been remove.
Some functions about unzipping files went into utilities.go

* Return something before rebooting after an update

* Handle error when looking for path

* Add autoupdater to vendor folder

* Add CORS origins for Scratch and ScratchX

Scratch hardware extensions are written in JavaScript and loaded in
Scratch (https://scratch.mit.edu) or the experimental extension site,
ScratchX (http://scratchx.org).

This change will allow the Scratch Arduino extension to use the
Create agent to communicate directly with Arduino boards.

Author: mastrolinux

README.md

@@ -92,6 +92,7 @@ By making a contribution to this project, I certify that:
     this project or the open source license(s) involved.
 ```
 
+
 ## Creating a release
 Just create a new release on github, and our drone server will build and upload
 the compiled binaries for every architecture in a zip file in the release itself.

config.ini

@@ -7,4 +7,4 @@ v = true  # show debug logging
 appName = CreateBridge
 updateUrl = http://downloads.arduino.cc/
 #updateUrl = http://localhost/
-origins = http://webide.arduino.cc:8080
+origins = http://webide.arduino.cc:8080, https://scratch.mit.edu, http://scratchx.org

main.go

@@ -14,7 +14,6 @@ import (
 	"time"
 
 	log "github.com/Sirupsen/logrus"
-	"github.com/carlescere/scheduler"
 	"github.com/gin-gonic/gin"
 	"github.com/itsjamie/gin-cors"
 	"github.com/kardianos/osext"
@@ -25,7 +24,6 @@ import (
 var (
 	version              = "x.x.x-dev" //don't modify it, Jenkins will take care
 	git_revision         = "xxxxxxxx"  //don't modify it, Jenkins will take care
-	embedded_autoupdate  = true
 	embedded_autoextract = false
 	hibernate            = flag.Bool("hibernate", false, "start hibernated")
 	verbose              = flag.Bool("v", true, "show debug logging")
@@ -142,25 +140,6 @@ func main() {
 				launchSelfLater()
 			}
 
-			if embedded_autoupdate {
-
-				var updater = &Updater{
-					CurrentVersion: version,
-					ApiURL:         *updateUrl,
-					BinURL:         *updateUrl,
-					DiffURL:        "",
-					Dir:            "update/",
-					CmdName:        *appName,
-				}
-
-				if updater != nil {
-					updater_job := func() {
-						go updater.BackgroundRun()
-					}
-					scheduler.Every(5).Minutes().Run(updater_job)
-				}
-			}
-
 			log.Println("Version:" + version)
 
 			// hostname
@@ -245,6 +224,7 @@ func main() {
 			r.GET("/info", infoHandler)
 			r.POST("/killbrowser", killBrowserHandler)
 			r.POST("/pause", pauseHandler)
+			r.POST("/update", updateHandler)
 
 			go func() {
 				// check if certificates exist; if not, use plain http