default help text aligned with menu when using menusetting(issue 195).
fixed a bug in dir()
Add new command 'raw'(run COMMAND with not auto-decompression.)(issue 200).

NEVER AUTO-DECOMPRESS for command `partnew`/`write`/`crc32`.
fixed a bug in dir();(reported by Steve6375,issue 154).
 default help text aligned with menu when using menusetting(issue 195).

Merge branch 'issue-195'
Merge branch 'master' into 0.4.6a
Bug Fixed

1. 修正上一个版本gunzip_test_header改动导致的BUG.
2. hexdump 修改，使用16字节对齐格式，并且最多可以显示10个十六进制数的偏移量.
Bug Fixed

1. 修正上一个版本gunzip_test_header改动导致的BUG.
2. hexdump 修改，使用16字节对齐格式，并且最多可以显示10个十六进制数的偏移量.
bug fixed(thanks Steve).
(tinybit) supported backslash-delimited pathname used by pxe server.(支持了 pxe 服务器端的反斜杠路径名。)
Merge branch 'master' into 0.4.6a
compatible with older devread 32-bit byte_offset
compatible with older devread 32-bit byte_offset
fix issue 203 and bugs in skip_to()
Merge branch 'master' into 0.4.6a
﻿. 使用 bootlace.com 安装 grldr.mbr 到 gpt 分区类型的设备。