Add support for vector index to get().

- Get() with efficient STRIDED transfer: Added support for copy to same image.
- Get() with efficient STRIDED transfer: Support for vector index added.
- General get(): Support for vector index added.
- Small style changes.

Fixes 427

Author: vehre

CMakeLists.txt

@@ -550,6 +550,7 @@ if(opencoarrays_aware_compiler)
     add_mpi_test(async_comp_alloc_2 2 ${tests_root}/unit/init_register/async_comp_alloc_2)
     add_mpi_test(comp_allocated_1 2 ${tests_root}/unit/init_register/comp_allocated_1)
     add_mpi_test(comp_allocated_2 2 ${tests_root}/unit/init_register/comp_allocated_2)
+    add_mpi_test(get_with_vector_index 4 ${tests_root}/unit/send-get/get_with_vector_index)
   endif()
   add_mpi_test(get_array 2 ${tests_root}/unit/send-get/get_array)
   add_mpi_test(get_self 2 ${tests_root}/unit/send-get/get_self)