Cleanups, header reorganization and more
	modified:   Makefile
	modified:   client.c
	modified:   common.c
	modified:   common.h
	modified:   daemon.c
	modified:   database/sqlite.c
	modified:   database/sqlite.h
	new file:   file/file.c
	new file:   file/file.h
	modified:   inotify/inotify.c
	modified:   md5/md5.c
	modified:   md5/md5.h
added DESIGN file explaining database structure