Add editorconfig file to simplify IDE setup

(cherry picked from commit 9988ed3)

Author: cboehme

.editorconfig

@@ -0,0 +1,35 @@
+#
+# Copyright 2017, 2018 Christoph Böhme
+#
+# Licensed under the Apache License, Version 2.0 the "License";
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+root=true
+
+[*]
+charset=utf-8
+end_of_line=lf
+insert_final_newline=true
+trim_trailing_whitespace=true
+indent_style=tab
+
+[{*.yml,*.yaml}]
+indent_style=space
+indent_size=2
+
+[*.gradle]
+indent_style=space
+indent_size=2
+
+[*.bat]
+end_of_line=crlf