Move internal modules into another directory

ed25519.lua

@@ -4,11 +4,11 @@
 --
 
 local expect = require "cc.expect".expect
-local fp =     require "ccryptolib.fp"
+local fp =     require "ccryptolib.internal.fp"
-local fq =     require "ccryptolib.fq"
+local fq =     require "ccryptolib.internal.fq"
-local sha512 = require "ccryptolib.sha512"
+local sha512 = require "ccryptolib.internal.sha512"
+local util =   require "ccryptolib.internal.util"
 local random = require "ccryptolib.random"
-local util =   require "ccryptolib.util"
 
 local unpack = unpack or table.unpack
 

internal/fq.lua

@@ -1,6 +1,6 @@
 --- Arithmetic on Curve25519's scalar field.
 --
--- @module ccryptolib.fq
+-- @module ccryptolib.internal.fq
 --
 
 local util = require "ccryptolib.util"

internal/sha512.lua

@@ -1,6 +1,6 @@
 --- The SHA512 cryptographic hash function.
 --
--- @module sha512
+-- @module ccryptolib.internal.sha512
 --
 
 local expect = require "cc.expect".expect