-Add a few global #defines: ZYNQ_CODE_IN_SDRAM and ZYNQ_SDRAM_INIT which are used in a few places to initialize or not initialze dram and affect the way the VM is brought up. -Add zybo-dram-test project
-Add a few global #defines: ZYNQ_CODE_IN_SDRAM and ZYNQ_SDRAM_INIT which are used in a few places to initialize or not initialze dram and affect the way the VM is brought up. -Add zybo-dram-test project