Draft: Dev

source files has moved to fw/src/usr/ Two tcl files(usr_io_fmc_l8_sfp.tcl and usr_io_fmc_l12_sfp.tcl) for pins mapping has been added. Also the IOSTANDARD was defined there. In the register_map_package.vhd the SFP_DDI_ has changed to sfp_ddmi. The labeling in user_core.vhd has been changed to lower case letters to maintain consistency