Added simple HTTP client.

For now the implementation is using Eiffel cURL library.
It requires Eiffel cURL coming with next EiffelStudio 7.0 (or from eiffelstudio's repo from rev#87244 )

library/client/http_client/src/http_client_request_context.e

@@ -0,0 +1,48 @@
+note
+	description: "Summary description for {HTTP_CLIENT_REQUEST_CONTEXT}."
+	author: ""
+	date: "$Date$"
+	revision: "$Revision$"
+
+class
+	HTTP_CLIENT_REQUEST_CONTEXT
+
+create
+	make
+
+feature {NONE} -- Initialization
+
+	make
+		do
+			create headers.make (2)
+			create query_parameters.make (5)
+			create form_data_parameters.make (10)
+		end
+
+feature -- Settings
+
+	credentials_required: BOOLEAN
+
+feature -- Access
+
+	headers: HASH_TABLE [READABLE_STRING_8, READABLE_STRING_8]
+
+	query_parameters: HASH_TABLE [READABLE_STRING_32, READABLE_STRING_8]
+
+	form_data_parameters: HASH_TABLE [READABLE_STRING_32, READABLE_STRING_8]
+
+feature -- Status report
+
+	has_form_data: BOOLEAN
+		do
+			Result := not form_data_parameters.is_empty
+		end
+
+feature -- Element change
+
+	set_credentials_required (b: BOOLEAN)
+		do
+			credentials_required := b
+		end
+
+end