README instructions not clear

[inorton]

With the current master branch cloned I get:

$ autoreconf -i
aclocal: warning: couldn't open directory 'm4': No such file or directory
configure.ac:18: error: possibly undefined macro: AC_MSG_FAILURE
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
autoreconf: /usr/bin/autoconf failed with exit status: 1

Which seems to be addressed in #11

Perhaps this should be mentioned in the README?

[levitte]

Sure. Done, see 3e44ef792bdc8a29b125c0cdd3cae9361c4f3c86