Add .clang-format file and script for styling

.clang-format

@@ -0,0 +1,9 @@
+---
+Language:       Cpp
+BasedOnStyle:   Google
+ColumnLimit:    100
+IndentWidth:    4
+ReflowComments: false
+#IndentPPDirectives: PPDIS_AfterHash #since clang 6.0
+...
+

scripts/make_style.sh

@@ -0,0 +1,19 @@
+if [ "$#" -ne 1 ]; then
+    echo -e "Usage: \n$0 DIRECTORY\n\twhere DIRECTORY is a derectory with sources for styling"
+    exit 1
+fi
+
+if ! [ -x "$(command -v clang-format)" ]; then
+  echo 'Error: clang-format is not installed. Please install clang-format with minimal version 3.8' >&2
+  exit 1
+fi
+
+DIR=$1
+
+FILES=`find $DIR -name "*.h" -or -name "*.cpp"`
+
+for FILE in $FILES
+do
+	echo "Set style for $FILE"
+	clang-format -i $FILE
+done