Makes few cleanning and adds an obi_dms C constructor

src/obidmscolumn.c

@@ -579,36 +579,3 @@ OBIDMSColumn_p obi_create_column(OBIDMS_p dms,
 //	}
 
 
-/************************************************************************
- ************************************************************************
- ************************************************************************/
-
-/**
- * @brief Reads a memory block from a file.
- *
- * * @param file The file that should be mapped.
- * * @param size The number of bytes that should be mapped.
- * * @param start The position at which the mapping should start.
- * @return A pointer on the first element of the block.
- */
-char* obi_map_read_only(int file, int start, int size)
-{
-	char* map;
-	map = (char*) mmap(0, size, PROT_READ, MAP_PRIVATE, file, start);
-	if (map == MAP_FAILED)
-	{
-		fprintf(stderr, "\nmmap read-only error\n");
-		exit(1);
-	}
-	return(map);
-}
-
-/**
- * @brief Unmaps a memory block.
- *
- * * @param size The size of the block that should be unmapped.
- */
-void obi_unmap(int size)
-{
-	munmap(0, size);
-}