Re-implement get() but this time with type/kind conversion and efficient copy to self.

Adds testcase for numeric get()s.
Todo: Add testcase for char array get()s.

Author: vehre

CMakeLists.txt

@@ -601,6 +601,7 @@ if(opencoarrays_aware_compiler)
   endif()
   add_caf_test(get_array 2 get_array)
   add_caf_test(get_self 2 get_self)
+  add_caf_test(get_convert_nums 2 get_convert_nums)
   add_caf_test(send_array 2 send_array)
   add_caf_test(send_convert_char_array 2 send_convert_char_array)
   add_caf_test(send_convert_nums 2 send_convert_nums)