doxygen.warnings.report.sh: add -i option to skip build, print-introspected-doxygen Also - Reorganize the usage message, since the options list has gotten quite long. - Standardize internal variables with underscores between words (very un-ns-3 like, but really this whole thing should be in python in wscript).

# Makefile wrapper for waf

all:
	./waf

# free free to change this part to suit your requirements
configure:
	./waf configure --enable-examples --enable-tests

build:
	./waf build

install:
	./waf install

clean:
	./waf clean

distclean:
	./waf distclean