Remove decompression instructions

Etcher is able to decompress `.xz` on the fly.

Signed-off-by: Juan Cruz Viotti <jviotti@openmailbox.org>

START.htm

@@ -164,35 +164,26 @@ <h2 id="update">Update board with latest software</h2>
     <h3>Step #1: Download the latest software image</h3>
     <p>Download "Debian" from <a target="_blank" href="http://beagleboard.org/latest-images">http://beagleboard.org/latest-images</a>.</p>
     <p><small><b>Note:</b>&nbsp;Due to sizing necessities, this download may take 30 minutes or more.</small></p>
-    <p>The Debian distribution ships with the boards. The file you download will have an .img.xz extention. This is a compressed sector-by-sector image of the SD card.</p>
+    <p>The Debian distribution ships with the boards. The file you download will have an .img.xz extension. This is a compressed sector-by-sector image of the SD card.</p>
     <img src="Docs/images/download-latestimage.png" width="50%" />
 
-    <h3>Step #2: Install compression utility</h3>
-    <p>Download and install <a target="_blank" href="http://www.7-zip.org/download.html">7-zip</a>.</p>
-    <img src="Docs/images/download-7zip.png" width="50%" /><br />
-    <img src="Docs/images/run-7zip-installer.png" width="50%" /><br />
-
-    <h3>Step #3: Decompress the image</h3>
-    <p>Use 7-zip to decompress the SD card .img file</p>
-    <img src="Docs/images/extract-latestimage.png" width="50%" /><br />
-
-    <h3>Step #4: Install SD card programming utility</h3>
+    <h3>Step #2: Install SD card programming utility</h3>
     <p>Download and install <a target="_blank" href="https://etcher.io/">Etcher</a>.</p>
     <img src="Docs/images/download-etcher.png" width="50%" /><br />
     <img src="Docs/images/install-etcher.png" width="50%" /><br />
     <p>Some general help on programming SD cards can be found on the <a target="_blank" href="http://help.ubuntu.com/community/Installation/FromImgFiles">Ubuntu Image Writer page</a>. 
 
-    <h3>Step #5: Connect SD card to your computer</h3>
+    <h3>Step #3: Connect SD card to your computer</h3>
     <p>Use the provided microSD card to SD adapter or a USB adapter to connect the SD card to your computer.</p>
 
-    <h3>Step #6: Write the image to your SD card</h3>
-    <p>Use Etcher to write the decompressed image to your SD card.</p>
+    <h3>Step #4: Write the image to your SD card</h3>
+    <p>Use Etcher to write the image to your SD card. Etcher will transparently decompress the image on-the-fly before writing it to the SD card.</p>
     <img src="Docs/images/write-latestimage.png" width="50%" />
 
-    <h3>Step #7: Eject the SD card</h3>
+    <h3>Step #5: Eject the SD card</h3>
     <p>Eject the newly programmed SD card.</p>
 
-    <h3>Step #8: Boot your board off of the SD card</h3>
+    <h3>Step #6: Boot your board off of the SD card</h3>
     <p>Insert SD card into your (powered-down) board, hold down the USER/BOOT button (if using Black) and apply power, either by the USB cable or 5V adapter.</p>
     <p>If using an original white BeagleBone, you are done.</p>
     <p>If using BeagleBone Black and the image is meant to program your on-board eMMC, you'll need to wait while the programming occurs.  When the flashing is complete, all 4 USRx LEDs will be lit solid.  <em>This can take up to 45 minutes.</em>  Power-down your board, remove the SD card and apply power again to be complete.</p>