configure and libtool

Hi,

We are using DRAMSim2 as part of a large project and I had to update the build infrastructure in DRAMSim2 to use autoconf (http://www.gnu.org/software/autoconf/).

I also replaced the custom make rules to build static and dynamic libraries by calls to libtool (http://www.gnu.org/software/libtool/) instead.

This helps build DRAMSim2 on a lot more platforms.

In case you are interested.

Seb.