feat: optimize out in Release builds

- fix: fastest scope matching,
- feat: try to allow the compiler to optimize out as many conditional statements as possible,
        which allow to use clutchlog for progress-only messages in Release mode.
- feat: build_all.sh test script,
- fix: typo in macro declarations in builds without clutchlog,
- update the README accordingly.

build_all.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+build()
+{
+    build_dir="$1_$2"
+    mkdir -p $build_dir
+    cd $build_dir
+    echo -ne "Build type: $1,\twith clutchlog: $2...\t"
+    (cmake -DCMAKE_BUILD_TYPE=$1 -DWITH_CLUTCHLOG=$2 .. && make && ctest) 2>&1 >> ../build_all.log
+    if [[ $? == 0 ]]; then
+        echo "OK"
+    else
+        echo "ERROR"
+    fi
+    cd ..
+}
+
+rm -f build_all.log
+
+for t in "Debug" "Release" "RelWithDebInfo"; do
+    for w in "ON" "OFF"; do
+        build $t $w
+    done
+done
+