Feature/ipc config

@odeke-em @joeybaker  please take a look
static char *config_key = "!config"; // You could set this as a global
size_t config_keylen = strlen(config_key); // Set this somewhere to be used for all

err = bud_hashmap_insert(&config->files.hashmap,
                                            config_key,
                                            config_keylen,
                                            (void*) content);
This should cut out hardcoding of "!config" which is used in numerous places