* Add buffer protocol
* Modify for some review comments
* Per-object buffer availability
* Rename to MemoryView from Buffer and make compilable
* Support integral repeat count in memory view format
* Support 'x' for padding bytes
* Add rb_memory_view_parse_item_format
* Check type in rb_memory_view_register
* Update dependencies in common.mk
* Add test of MemoryView
* Add test of rb_memory_view_init_as_byte_array
* Add native size format test
* Add MemoryView test utilities
* Add test of rb_memory_view_fill_contiguous_strides
* Skip spaces in format string
* Support endianness specifiers
* Update documentation
* Support alignment
* Use RUBY_ALIGNOF
* Fix format parser to follow the pack format
* Support the _ modifier
* Parse count specifiers in get_format_size function.
* Use STRUCT_ALIGNOF
* Fix test
* Fix test
* Fix total size for the case with tail padding
* Fix rb_memory_view_get_item_pointer
* Fix rb_memory_view_parse_item_format again
