Introduce new, Hugo templates based, website (#713)

* Add new hugo-based website for hawkBit

Signed-off-by: Jeroen Laverman <jeroen.laverman@bosch-si.com>

* Fix broken links + wordings
- , i.e. -> i.e,
- , e.g. -> e.g.,
- hawkbit -> hawkBit
- don't -> do not
- isn't -> is not

Signed-off-by: Jeroen Laverman <jeroen.laverman@bosch-si.com>

* Remove old documentation and add maven integration

Signed-off-by: Jeroen Laverman <jeroen.laverman@bosch-si.com>

* Add Intellij files to ignore

Signed-off-by: Jeroen Laverman <jeroen.laverman@bosch-si.com>

* Update README

Signed-off-by: Jeroen Laverman <jeroen.laverman@bosch-si.com>

* Update Copyright header
* exclude website artifacts

Signed-off-by: Jeroen Laverman <jeroen.laverman@bosch-si.com>

* Harmonize usage of i.e. and e.g.

Signed-off-by: Jeroen Laverman <jeroen.laverman@bosch-si.com>

* Add remark for windows user

Signed-off-by: Jeroen Laverman <jeroen.laverman@bosch-si.com>

* Fix indention

Signed-off-by: Jeroen Laverman <jeroen.laverman@bosch-si.com>

* Introduce review findings

Signed-off-by: Jeroen Laverman <jeroen.laverman@bosch-si.com>

* Change image in 'run hawkbit' guide

Signed-off-by: Jeroen Laverman <jeroen.laverman@bosch-si.com>

docs/layouts/partials/copyright.html

@@ -0,0 +1,33 @@
+<aside class="copyright" role="note">
+  <div class="logo">
+    <a href="https://www.eclipse.org" target="_blank">
+      <img src="/hawkbit/images/eclipse_foundation_logo.png" />
+    </a>
+  </div>
+  <p class="notice">
+    {{ with .Site.Params.copyright }}
+    &copy; {{ now.Year }} {{ . }} &ndash;
+    {{ end }}
+    Documentation built with
+    <a href="https://www.gohugo.io" target="_blank">Hugo</a>
+    using the
+    <a href="http://github.com/digitalcraftsman/hugo-material-docs" target="_blank">Material</a> theme.
+  </p>
+  <p class="quickLinks">
+    <a href="http://www.eclipse.org/legal/privacy.php" target="_blank">
+      &gt; Privacy Policy
+    </a>
+    <a href="http://www.eclipse.org/legal/termsofuse.php" target="_blank">
+      &gt; Terms of Use
+    </a>
+    <a href="http://www.eclipse.org/legal/copyright.php" target="_blank">
+      &gt; Copyright Agent
+    </a>
+    <a href="http://www.eclipse.org/legal" target="_blank">
+      &gt; Legal
+    </a>
+    <a href="https://www.eclipse.org/org/documents/epl-v10.php" target="_blank">
+      &gt; License
+    </a>
+  </p>
+</aside>