update to pxt 5 and pxt-common-packages 6 (#934)

* bump pxt

* fix build issues

* Auto-gen of projects/summary

* removing feild editors moved to pxt

* various typing fixes

* more typing fixes

* fixing various typing issues

* Start on integration of new pxt

* serial number fixes

* gc-ify MMap object

* Re-build generated files

* fix console listeners

* clear lf() warnings

* More generated files

* also auto-generated

* Compilation fixes

* fix merge

* mostly fixing blocks

* fix sim

* fix field motors

* enable a few features

* moving to tsx

* try to fix edtiro compilation

* more defs

* removing commands

* removing extra $

* fix blockly warning

* hiding images

* enabling more pxt features

* hide images

* setup autorun

* add lock on target_reset

* update deps

* return trylock result

* updated pxt

* rename video section

* add alpha channel

* upgraded pxt

* bump pxt/version

* removed alpha ref

* var ceanup

* don't do major bump

libs/screen/screenimage.ts

@@ -0,0 +1,10 @@
+
+namespace image {
+    /**
+    * Get the screen image
+    */
+    //%
+    export function screenImage(): Image {
+        return screen;
+    }
+}

libs/screen/shims.d.ts

@@ -15,7 +15,7 @@ declare interface Image {
     height: int32;
 
     /**
-     * True iff the image is monochromatic (black and white)
+     * True if the image is monochromatic (black and white)
      */
     //% property shim=ImageMethods::isMono
     isMono: boolean;
@@ -45,6 +45,18 @@ declare interface Image {
     //% shim=ImageMethods::fill
     fill(c: int32): void;
 
+    /**
+     * Copy row(s) of pixel from image to buffer (8 bit per pixel).
+     */
+    //% shim=ImageMethods::getRows
+    getRows(x: int32, dst: Buffer): void;
+
+    /**
+     * Copy row(s) of pixel from buffer to image.
+     */
+    //% shim=ImageMethods::setRows
+    setRows(x: int32, src: Buffer): void;
+
     /**
      * Return a copy of the current image
      */