Build: introduce build settings shared by lib and examples

Makefile.conf

@@ -0,0 +1,12 @@
+HERE:=$(dir $(lastword $(MAKEFILE_LIST)))
+-include $(HERE)build.conf
+
+TARGET_LIB ?= libdizzy
+DEBUG ?= 0
+
+LIBDAISY_DIR ?= ../../heck_libDaisy
+DAISYSP_DIR ?= ../../heck_DaisySP
+
+CXX_STANDARD ?= -std=c++17
+CXXFLAGS += -Wall -Wno-unused -Wno-reorder-ctor -Wno-switch
+CXXFLAGS += -fdiagnostics-color=always