Add HTC-specific fastboot instructions and update
relevant device markdowns

Newer HTC devices require recovery to be flashed from Download mode,
not bootloader. Update "adb reboot bootloader" command to
"adb reboot download" so that the instructions are correct.

Change-Id: I6a833464835c2cb8ab976fcbf5ee8630623f1382
diff --git a/_includes/fastbootinstallhtc.html b/_includes/fastbootinstallhtc.html
new file mode 100644
index 0000000..e32a0a2
--- /dev/null
+++ b/_includes/fastbootinstallhtc.html
@@ -0,0 +1,19 @@
+{% capture fastboot %}fastboot{% if page.fastbootvendor %} -i 0x{{ page.fastbootvendor }}{% endif %}{% endcapture %}
+<html>
+<div class='page-heading' id='fastboot-install'>Fastboot Install Method (No Root Required):</div>
+<a id='fastboot'></a>
+<hr />
+<p class="text"><a href="http://developer.android.com/sdk/index.html#linux-bundle-size">You will need the platform-tools from the Android SDK on your computer.</a> Find the Android command line tools section on the page linked and install the SDK tools package. From the SDK Manager, download only the platform-tools to get adb and fastboot binaries.</p>
+<p class="text">Windows users will need proper drivers installed on their computer. You can try the <a href="http://www.xda-developers.com/universal-naked-driver-solves-your-adb-driver-problems-on-windows/">Naked ADB drivers</a> or the <a href="http://www.koushikdutta.com/post/universal-adb-driver">Universal ADB drivers</a> if you don't already have a working driver installed</p>
+<p class="text">On your device, go into Settings -> About and find the Build Number and tap on it 7 times to enable developer settings. Press back and go into Developer Options and enable USB debugging. From your computer, open a command prompt and type:</p>
+<p class="code">adb reboot download</p>
+<p class="text">You should now be in fastboot mode.</p>
+{% if page.fastbootunlock %}
+<p class="text">Your device needs to be unlocked before it can flash custom images. To unlock your device type:</p>
+<p class="code">{{ fastboot }} oem unlock</p>
+{% endif %}
+<p class="text">Download the correct image file and copy the file into the same folder as your adb and fastboot binaries. Rename the image to twrp.img and type:</p>
+<p class="code">{{ fastboot }} flash recovery twrp.img</p>
+<p class="code">{{ fastboot }} reboot</p>
+<p class="text">Note many devices will replace your custom recovery automatically during first boot. To prevent this, use <a href="http://www.google.com">Google</a> to find the proper key combo to enter recovery. After typing <span class="code">{{ fastboot }} reboot</span>, hold the key combo and boot to TWRP. Once TWRP is booted, TWRP will patch the stock ROM to prevent the stock ROM from replacing TWRP. If you don't follow this step, you will have to repeat the install.</p>
+</html>