move to kii_custom.h
Merge pull request #82 from KiiCorp/custom

move to kii_custom.h
Add assertion in kii_init_thing_bucket.
Merge pull request #83 from KiiCorp/assertArgs

Add assertion in kii_init_thing_bucket.
Enforce assertion.
Merge pull request #84 from KiiCorp/assertArgs

Enforce assertion.
divide register_thing.
divide kii_create_new_object.
divide kii_create_new_object_with_id.
divide kii_patch_object.
divide kii_replace_object.
divide kii_get_object.
divide kii_install_thing_push.
divide kii_get_mqtt_endpoint.
remove tabs.
change kii_json* to json*.
fix from review.