Modernize configure.ac

  Fix Issue #9: configure.in needs modernization

  + Rename configure.in to configure.ac.
  + Use no-arg AC_INIT_AUTOMAKE.

Author: bsmith94

configure.in configure.acconfigure.in renamed to configure.ac

@@ -1,5 +1,5 @@
 AC_INIT(qperf, 0.4.10, [email protected])
-AM_INIT_AUTOMAKE(qperf, 0.4.10)
+AM_INIT_AUTOMAKE
 AC_PROG_CC
 AC_CHECK_LIB(ibverbs, ibv_open_device, RDMA=1)
 AC_CHECK_LIB(ibverbs, ibv_open_xrc_domain, HAS_XRC=1)