PDF security features (#26)

- Support for adding and removing passwords
- Support for watermarks
- Dedicated page remover
- Support for PDF permissions
- Removed endpoint /home and replaced with /
- Code cleanups
- Fixed page titles

src/main/resources/templates/fragments/footer.html

@@ -0,0 +1,11 @@
+<div th:fragment="footer">
+	<link rel="stylesheet"
+		href="https://use.fontawesome.com/releases/v5.6.1/css/all.css">
+	<footer id="footer" class="text-center py-3">
+		<a href="https://github.com/Frooodle/Stirling-PDF" target="_blank"
+			class="mx-1"> <i class="fab fa-github fa-2x"></i>
+		</a> <a href="https://hub.docker.com/r/frooodle/s-pdf" target="_blank"
+			class="mx-1"> <i class="fab fa-docker fa-2x"></i>
+		</a>
+	</footer>
+</div>