Structure of the Newton package file header
documented by Victor Rehorst <chuma@chuma.org>
Version 1	03/12/2001
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

All bytes are in big-endian order.

0x00-0x07 = signature ('package0' or 'package1') (byte[8])
0x08-0x0B = reserved1 (0x00000000) (ULong)
0x0C-0x0F = flags (only the highest (0x0C) byte is actually used) (ULong)
0x10-0x13 = version (ULong)
0x14-0x17 = InfoRef to copyright (may be empty) (Unicode string)
0x18-0x1B = InfoRef to name (Unicode string)
0x1C-0x1F = length of entire package in bytes (ULong)
0x20-0x23 = creationDate (in seconds since 00:00 Jan 4 1904) (Date)
0x24-0x27 = reserved2 (0x00000000) (ULong)
0x28-0x2B = reserved3 (0x00000000) (ULong)
0x2C-0x2F = directory size (total size of package directory including fixed 
            and variable parts) (ULong)
0x30-0x33 = number of parts in package. (ULong)

0x34 (52) bytes total

Followed by part entries (offsets are only for the first entry):

0x34-0x37 = offset of part data from beginning of part section. (ULong)
0x38-0x3B = size of the part data (ULong)
0x3C-0x3F = size of the part data, must be same value as previous (ULong)
0x40-0x43 = type of part (ULong, ASCII encoded)
0x44-0x47 = reserved (ULong)
0x48-0x4B = flags (only two lowest bytes are used)
0x4C-0x4F = InfoRef to information (???)
0x50-0x53 = reserved (ULong)

0x54 (84) bytes total (with one part entry)

Data Types
~~~~~~~~~~

ULong	Unsigned 32-bit integer.
UShort 	Unsigned 16-bit integer.
Byte	Unsigned byte (or ASCII character).
UniChar Two-byte Unicode character.
Date 	Unsigned 32-bit integer representing a date and time as the number of
        seconds since midnight, January 4, 1904.
InfoRef An unsigned 16-bit offset followed by an unsigned 16-bit length.
        InfoRefs are used to refer to variable-length data items in the
        variable-length data area of the package directory. The offset is from
        the beginning of the data area; the length is the number of bytes in
        the data item.  **Strings referred to by InfoRefs are terminated by a
        Null symbol, usually**

Package Flags (0x0C - 0x0F)
~~~~~~~~~~~~~~~~~~~~~~~~~~~

kAutoRemoveFlag: 0x80000000
	Parts in the package are to be removed immediately after
installation.

kCopyProtectFlag: 0x40000000
	Marks the package as copy-protected.  The Newton OS will refuse to copy or
	beam a protected package.

kNoCompressionFlag: 0x10000000
	The OS is not to compress the package upon installation.  The default is
	to compress.

kRelocationFlag: 0x04000000 (2.x only)
	Denotes that the package contains relocation information.  Package signature
	must also be "package1"

kUseFasterCompressionFlag: 0x02000000 (2.x only)
	Package should be compressed using a faster (but less efficient) compression
	method.  Package signature must also be "package1"

Part Entry Flags
~~~~~~~~~~~~~~~~

kProtocolFlag: 0x00000000
kNOSPart: 0x00000001
kRawPart: 0x00000002
	Specifies whether the part contains a protocol, a region of NOS objects, or
	raw data.

kAutoLoadFlag: 0x00000010
	Part should be registered automatically when the package is activated.  Only
	valid for protocol parts.

kAutoRemoveFlag: 0x00000020
	Part should be unregistered automatically when the package is deactivated.
	Only valid for protocol parts.

kNotifyFlag: 0x00000080
	Denotes that the system handler corresponding to the part's type should be
	notified.

kAutoCopyFlag: 0x00000100
	Denotes that the part should be moved into permanent resident memory before
	being activated.  Used for parts that cannot tolerate the normal page-faulting
	mechanism.