Version 0.12.1: Pulled in patches from Astrasel to initialize the frequency offset estimate array in liblte_phy_dl_find_coarse_timing_and_freq_offset, from Jevgenij for supporting non-B2X0 USRPs in LTE_fdd_dl_scan, from Max Suraev for more descriptive start failures in LTE_fdd_enodeb, and from Andrew Murphy to add DCI 1C unpacking to the LTE library, also added support for PRB allocation differences in each slot and fixed a bug in lte_fdd_dl_transmit relating to PDCCH REG mapping.