Move sequence_bt and string_bt into helpers.

They are useful in the Redis backend and in helpers itself.
People wanting to use pq alone from this project will have to cope and
search for all the needed files.

include/helpers/sequence_bt.hpp

@@ -20,7 +20,7 @@
 
 #include <cstddef>
 
-namespace pq {
+namespace dinhelp {
 	namespace bt {
 		template <std::size_t... I>
 		struct index_seq {
@@ -43,6 +43,6 @@ namespace pq {
 		template <std::size_t MIN, std::size_t MAX>
 		using index_range = typename implem::range_builder<MIN, MAX>::type;
 	} //namespace bt
-} //namespace pq
+} //namespace dinhelp
 
 #endif

include/helpers/string_bt.hpp

@@ -18,12 +18,12 @@
 #ifndef id170B0E6C34D14EBA9B92A35977BDBFB3
 #define id170B0E6C34D14EBA9B92A35977BDBFB3
 
-#include "pq/implem/sequence_bt.hpp"
+#include "sequence_bt.hpp"
 #include <cstddef>
 #include <iostream>
 #include <stdexcept>
 
-namespace pq {
+namespace dinhelp {
 	namespace bt {
 		template <std::size_t S>
 		class string;
@@ -107,6 +107,6 @@ namespace pq {
 			return string<S>(parData);
 		}
 	} //namespace bt
-} //namespace pq
+} //namespace dinhelp
 
 #endif

include/pq/implem/pq_type_helpers.hpp

@@ -18,7 +18,7 @@
 #ifndef idEC73C3E4D64D44ABA0DB7D41FA8A7EB7
 #define idEC73C3E4D64D44ABA0DB7D41FA8A7EB7
 
-#include "pq/implem/string_bt.hpp"
+#include "helpers/string_bt.hpp"
 #include <chrono>
 #include <type_traits>
 #include <boost/utility/string_ref.hpp>
@@ -30,6 +30,8 @@ struct pg_param;
 typedef pg_param PGparam;
 
 namespace pq {
+	namespace bt = dinhelp::bt;
+
 	class Connection;
 
 	namespace implem {