Minor changes in documentation and removed non implemented functions

Removed the non-implemeted functions `capture/3`, `purchase/3`, `refund/3`, `void/2`, `store/2` and `unstore/2`.

lib/gringotts/gateways/securion_pay.ex

@@ -16,7 +16,7 @@ defmodule Gringotts.Gateways.SecurionPay do
   ## The `opts` argument
 
   Most `Gringotts` API calls accept an optional `keyword` list `opts` to supply
-  [optional arguments][extra-arg-docs] for transactions with the MONEI
+  [optional arguments][extra-arg-docs] for transactions with the SecurionPay
   gateway. The following keys are supported:
 
   | Key                      | Remark                                                                                        |
@@ -59,7 +59,7 @@ defmodule Gringotts.Gateways.SecurionPay do
   alias Gringotts.{CreditCard, Response, Address}
 
   @doc """
-  Authorize a credit card transaction.
+  Authorizes a credit card transaction.
 
   The authorization validates the `card` details with the banking network,
   places a hold on the transaction `amount` in the customer’s issuing bank and
@@ -118,124 +118,6 @@ defmodule Gringotts.Gateways.SecurionPay do
     |> respond
   end
 
-  @doc """
-  Captures a pre-authorized `amount`.
-
-  `amount` is transferred to the merchant account by SecurionPay used in the
-  pre-authorization referenced by `payment_id`.
-
-  ## Note
-
-  > If there's anything noteworthy about this operation, it comes here.
-  > For example, does the gateway support partial, multiple captures?
-
-  ## Example
-
-  > A barebones example using the bindings you've suggested in the `moduledoc`.
-  """
-  @spec capture(String.t(), Money.t(), keyword) :: {:ok | :error, Response}
-  def capture(payment_id, amount, opts) do
-    # commit(args, ...)
-  end
-
-  @doc """
-  Transfers `amount` from the customer to the merchant.
-
-  SecurionPay attempts to process a purchase on behalf of the customer, by
-  debiting `amount` from the customer's account by charging the customer's
-  `card`.
-
-  ## Note
-
-  > If there's anything noteworthy about this operation, it comes here.
-
-  ## Example
-
-  > A barebones example using the bindings you've suggested in the `moduledoc`.
-  """
-  @spec purchase(Money.t(), CreditCard.t(), keyword) :: {:ok | :error, Response}
-  def purchase(amount, card = %CreditCard{}, opts) do
-    # commit(args, ...)
-  end
-
-  @doc """
-  Voids the referenced payment.
-
-  This method attempts a reversal of a previous transaction referenced by
-  `payment_id`.
-
-  > As a consequence, the customer will never see any booking on his statement.
-
-  ## Note
-
-  > Which transactions can be voided?
-  > Is there a limited time window within which a void can be perfomed?
-
-  ## Example
-
-  > A barebones example using the bindings you've suggested in the `moduledoc`.
-  """
-  @spec void(String.t(), keyword) :: {:ok | :error, Response}
-  def void(payment_id, opts) do
-    # commit(args, ...)
-  end
-
-  @doc """
-  Refunds the `amount` to the customer's account with reference to a prior transfer.
-
-  > Refunds are allowed on which kinds of "prior" transactions?
-
-  ## Note
-
-  > The end customer will usually see two bookings/records on his statement. Is
-  > that true for SecurionPay?
-  > Is there a limited time window within which a void can be perfomed?
-
-  ## Example
-
-  > A barebones example using the bindings you've suggested in the `moduledoc`.
-  """
-  @spec refund(Money.t(), String.t(), keyword) :: {:ok | :error, Response}
-  def refund(amount, payment_id, opts) do
-    # commit(args, ...)
-  end
-
-  @doc """
-  Stores the payment-source data for later use.
-
-  > This usually enable "One Click" and/or "Recurring Payments"
-
-  ## Note
-
-  > If there's anything noteworthy about this operation, it comes here.
-
-  ## Example
-
-  > A barebones example using the bindings you've suggested in the `moduledoc`.
-  """
-  @spec store(CreditCard.t(), keyword) :: {:ok | :error, Response}
-  def store(%CreditCard{} = card, opts) do
-    # commit(args, ...)
-  end
-
-  @doc """
-  Removes card or payment info that was previously `store/2`d
-
-  Deletes previously stored payment-source data.
-
-  ## Note
-
-  > If there's anything noteworthy about this operation, it comes here.
-
-  ## Example
-
-  > A barebones example using the bindings you've suggested in the `moduledoc`.
-  """
-  @spec unstore(String.t(), keyword) :: {:ok | :error, Response}
-  def unstore(registration_id, opts) do
-    # commit(args, ...)
-  end
-
   ###############################################################################
   #                                PRIVATE METHODS                              #
   ###############################################################################