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/install-theme.sh

@@ -0,0 +1,36 @@
+#
+# Copyright (c) 2018 Bosch Software Innovations GmbH and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Eclipse Public License v1.0
+# which accompanies this distribution, and is available at
+# http://www.eclipse.org/legal/epl-v10.html
+#
+
+# This script checks if 'hugo' is installed. Afterwards, the Hugo theme is downloaded.
+
+#!/bin/bash
+
+
+hugo version
+if [ $? != 0 ]
+then
+    echo "[ERROR] Please install Hugo first before proceeding."
+    exit 1
+fi
+
+echo "[INFO] "
+echo "[INFO] Install Hugo Theme"
+HUGO_THEMES=themes/hugo-material-docs
+
+if [ ! -d ${HUGO_THEMES} ]
+then
+    git submodule add --force https://github.com/digitalcraftsman/hugo-material-docs.git ${HUGO_THEMES}
+    echo "[INFO] ... done"
+else
+    echo "[INFO] ... theme already installed in: ${HUGO_THEMES}"
+fi
+
+echo "[INFO] "
+echo "[INFO] Launch the documentation locally by running 'mvn site' (or 'hugo server' in the docs directory),"
+echo "[INFO] and browse to 'http://localhost:1313/hawkbit/'. "