update cmake management of rawc binary to be debian-packager - friendly
added doc installer
update doc
	LWS_CALLBACK_HTTP: be more precise on returned value from callback
	added doc for libwebsockets_serve_http_bin()
debian packager
add doc for libwebsockets_serve_http_bin()
debian packager update
	- add attack.sh to -dev package
	- make debbuild happy with changelog
debian management
	add an external rule to dh for automatically building source tarball:
	make -f debian/rules source