ec_pdo_t and ec_pdo_entry_t classes, added fmmu_config_t, adjusted
minimal example, etc...

managers.

ec_master_sync_io(); introduced events in the master state machine;
locking of slave scanning and slave configuration through allow_scan
and allow_config flags.

global.

ec_master_calc_addressing(), coupler_index and coupler_subindex variables.
Adapted lsec script and examples.

ec_pdo_entry_t, respectively.

guessing, ignoring base_sync_count.