[build] Update flags to work with Pin 2.13
[misc/hooks] Don't hardcode JDK path
[mem/dramsim] Build correctly without DRAMSim

Added missing stub for DRAMSimMemory::initStats()
[config] Interface workaround for older versions of libconfig

This way we can use the libconfig package in Ubuntu 12.04.
[misc] Add vagrant file

Simple config to provision a fresh Ubuntu 12.04 VM.
[README] Add vagrant instructions