Moved AWS4AuthLayer from AWSAuth.jl into AWSCore.jl

Moved AWS4AuthLayer into this package from AWSAuth.jl. Originally wanted to
move AWSCredentials into AWSAuth.jl however this would create a circular
dependency. Instead we're moving AWS4AuthLayer into AWSCore.jl. This now
allows us to clean up HTTP.jl and remove AWS functionality from it.

Project.toml

@@ -1,6 +1,6 @@
 name = "AWSCore"
 uuid = "4f1ea46c-232b-54a6-9b17-cc2d0f3e6598"
-version = "0.6.2"
+version = "0.6.3"
 
 [deps]
 Base64 = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
@@ -11,12 +11,14 @@ IniFile = "83e8ac13-25f8-5344-8a64-a9f2b223428f"
 JSON = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
 LazyJSON = "fc18253b-5e1b-504c-a4a2-9ece4944c004"
 MbedTLS = "739be429-bea8-5141-9913-cc70e7f3736d"
+Mocking = "78c3b35d-d492-501b-9361-3d52fe80e533"
 Retry = "20febd7b-183b-5ae2-ac4a-720e7ce64774"
 Sockets = "6462fe0b-24de-5631-8697-dd941f90decc"
 SymDict = "2da68c74-98d7-5633-99d6-8493888d7b1e"
 XMLDict = "228000da-037f-5747-90a9-8195ccbf91a5"
 
 [compat]
+Mocking = "0.7"
 julia = "1"
 
 [extras]

src/AWSCore.jl

@@ -8,8 +8,8 @@
 module AWSCore
 
 
-export AWSException, AWSConfig, AWSRequest,
-       aws_config, default_aws_config
+export AWSException, AWSConfig, AWSRequest, SignatureV4, aws_config, default_aws_config,
+    http_get
 
 using Base64
 using Dates
@@ -49,14 +49,15 @@ It contains the following keys:
 """
 const AWSRequest = SymbolDict
 
-
 include("http.jl")
 include("AWSException.jl")
 include("AWSCredentials.jl")
+include("deprecations.jl")
 include("names.jl")
 include("mime.jl")
-
-
+include("signaturev4.jl")
+include("sign.jl")
+include("Services.jl")
 
 #------------------------------------------------------------------------------#
 # Configuration.
@@ -106,7 +107,6 @@ as follows. However, putting access credentials in source code is discouraged.
 aws = aws_config(creds = AWSCredentials("AKIAXXXXXXXXXXXXXXXX",
                                         "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"))
 ```
-
 """
 function aws_config(;profile=nothing,
                      creds=AWSCredentials(profile=profile),
@@ -120,6 +120,8 @@ global _default_aws_config = nothing # Union{AWSConfig,Nothing}
 
 
 """
+    default_aws_config()
+
 `default_aws_config` returns a global shared [`AWSConfig`](@ref) object
 obtained by calling [`aws_config`](@ref) with no optional arguments.
 """
@@ -138,7 +140,6 @@ end
 Convert nested `Vector{Pair}` maps in `args` into `Dict{String,Any}` maps.
 """
 function aws_args_dict(args)
-
     result = stringdict(args)
 
     dictlike(t) = (t <: AbstractDict
@@ -557,11 +558,6 @@ global debug_level = 0
 function set_debug_level(n)
     global debug_level = n
 end
-
-
-include("Services.jl")
-
-
 end # module AWSCore