add clang format check to CI and adjust formatting (#55)

CI/formatcode.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+# Original source https://github.com/Project-OSRM/osrm-backend/blob/master/scripts/format.sh
+
+set +x
+set -o errexit
+set -o pipefail
+set -o nounset
+
+# Runs the Clang Formatter in parallel on the code base.
+# Return codes:
+#  - 1 there are files to be formatted
+#  - 0 everything looks fine
+
+# Get CPU count
+OS=$(uname)
+NPROC=1
+if [[ $OS = "Linux" || $OS = "Darwin" ]] ; then
+    NPROC=$(getconf _NPROCESSORS_ONLN)
+fi
+
+# Discover clang-format
+if type clang-format-8 2> /dev/null ; then
+    CLANG_FORMAT=clang-format-8
+else
+    CLANG_FORMAT=clang-format
+fi
+
+find .. -type d \( -path ./deps \
+-o -path ./cmake \
+-o -path ./build \) -prune -type f -o -name '*.h' -or -name '*.hpp' -or -name '*.m' -or -name '*.mm' -or -name '*.c' -or -name '*.cpp' \
+| xargs -L100 -P${NPROC} ${CLANG_FORMAT} -i -style=file  -fallback-style=none