Add faq for description of TWRP.

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+---
+layout: post
+title:  "What is TWRP?"
+---
+
+<div class='page-heading'>What is TWRP?</div>
+<hr />
+TWRP stands for TeamWin Recovery Project. It is a custom touch recovery that is GUI based.<br/>
+<img src="https://twrp.me/images/home.png" alt="TWRP Home" /><br/>
+TWRP allows the following features:
+<ul>
+<li>Backups of partitions in TAR or raw Image format</li>
+<li>Restore backups from internal storage, external SD storage or OTG devices</li>
+<li>Custom Firmware installation</li>
+<li>Partition wiping</li>
+<li>File deletion</li>
+<li>Terminal access</li>
+<li>ADB Root Shell</li>
+<li>Theme Support</li>
+<li>Possible decryption support depending on device</li>
+</ul>