renamed schema to repository

demo/main.cpp

@@ -5,7 +5,7 @@
 #include "matador/query/condition.hpp"
 
 #include "matador/object/object_ptr.hpp"
-#include "matador/object/schema.hpp"
+#include "matador/object/repository.hpp"
 
 #include "matador/utils/access.hpp"
 #include "matador/utils/default_type_traits.hpp"
@@ -161,7 +161,7 @@ int main() {
     const std::string env_var{"MATADOR_BACKENDS_PATH"};
 
     std::string dns{"sqlite://demo.db"};
-    schema s( "main" );
+    repository s( "main" );
     auto result = s.attach<author>( "authors" ).and_then( [&s] {
         return s.attach<book>( "books" );
     } );