+ replacing PHY_vars_eNB_g by PHY_vars_eNB_NB_IoT_g

all include of defs.h by defs_nb_iot.h in 33 files.

replacing NB by NB_IoT in SCHED/IF_Module_L1_primitives_nb_iot.c,SCHED/defs_nb_iot.h,SCHED/phy_procedures_lte_eNb_nb_iot.c,targets/RT/USER/lte-enb.c

adding NPDCCH structure for UE specific and Common Search space. To be implemented NPDCCH repetitions.Code Copile. 145 Warnings

introduction of some UE-specific parameters for NPDCCH (Seems missing in FAPI for the moment). Code copile, 149 warnings

Adding preliminary .config file for nb-iot (to be completed), adding EARFCN calculation for configuration with corresponding table for UE cat NB1/NB2

 adding some consideration and implement some checking based on FAPI specifications for ndlsch path. Function for encoding, modulation ecc.. still to be added. Code Compile. 144 warnings

modified conditions for triggering the npdsch_procedure, still modulation, encoding...functions to be integrated. Warnings 144.Code compile

Setup of required variables for managing the SI messages transmission, according to our Assumptions. Still to include the function for encoding, scrambling ecc.. of npdsch and npdcch for the DL path. Code compile. 141 Warnings

path for NDLSCH procedure almost completed (missed coding, modulation and scrambling functions). Code compile. 140 warnings

almost complete the ndlsch and npdcch path. missed the coding, modulation and scrambling function.Code compile. 140 warnings

review of PHY_Config_t structure parameters for FAPI-like approach. Implement the FAPI required parameters and adding some extras in separate structure. Code compile

Implementation of configuration data structures following FAPI-like approach. Some parameters seem to be non implemented in FAPI (for the moment addedd manually). Cleaning of some part of RRC code. Code compile.

Added new files for IF-module purposes (still to complete), review some configuration procedure for FAPI-like approach. Code compile