First Commit. Datascheme is in tests

templates/main.php

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+<?php
+\OCP\Util::addScript('ocsms', 'script');
+\OCP\Util::addStyle('ocsms', 'style');
+?>
+
+<div id="app">
+	<div id="app-navigation">
+		<?php print_unescaped($this->inc('part.navigation')); ?>
+		<?php print_unescaped($this->inc('part.settings')); ?>
+	</div>
+
+	<div id="app-content">
+		<div id="app-content-wrapper">
+			<?php print_unescaped($this->inc('part.content')); ?>
+		</div>
+	</div>
+</div>

templates/part.content.php

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+<p>Hello World <?php p($_['user']) ?></p>
+
+<p><button id="hello">click me</button></p>
+
+<p><textarea id="echo-content">
+	Send this as ajax
+</textarea></p>
+<p><button id="echo">Send ajax request</button></p>
+
+Ajax response: <div id="echo-result"></div>

templates/part.navigation.php

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+<ul>
+	<li><a href="#">First level entry</a></li>
+	<li>
+		<a href="#">First level container</a>
+		<ul>
+			<li><a href="#">Second level entry</a></li>
+			<li><a href="#">Second level entry</a></li>
+		</ul>
+	</li>
+</ul>

templates/part.settings.php

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+<div id="app-settings">
+	<div id="app-settings-header">
+		<button class="settings-button"
+				data-apps-slide-toggle="#app-settings-content"
+		></button>
+	</div>
+	<div id="app-settings-content">
+		<!-- Your settings in here -->
+	</div>
+</div>