+ added Packet::getPacketHeader(), getPacketDataFieldHeader(), getPacketSourceDataField(), getPacketTail()
+ all attributes of Packet and PacketDataField are protected
+ renamed SDFRBBlock in SDFBlock
+ renamed SDFRBlock in SourceDataField
+ removed all the code of packet types 1, 2, and 3
+ Packet::getBSPacket()

Added Packet:: getBSPrefix(), getBSHeader(), getBSDataFieldHeader(), getBSSourceDataFieldsFixedPart(), getBSSourceDataFieldsVariablePart(), getBSTail() and some internal changes in bool setPacketValue(ByteStreamPtr stream, int decodeType)

in Packet added dimPacketHeader, dimPacketDataFieldHeader, dimPacketSourceDataFieldFixed, dimPacketTail, dimPacketStartingFixedPart and related methods

+ move InputPacketStream::getPacket to PacketStream
+ move InputPacketStream::getPacketDimension to PacketStream
+ changed onlySections in Packet to decodeType
+ moved Packet::setByteStreamPointers into protected section

Packet* InputPacketStream::readPacket(int decodeType) and Packet* getPacket(ByteStreamPtr packet, int decodeType = 2)

Conflicts:
	include/SourceDataField.h
	src/ByteStream.cpp
	src/InputPacketStream.cpp
	src/Packet.cpp

added (1) decoding only section (bool onlySections), (2) PartOfPacket::decode() only on demand (3) ByteStream(ByteStreamPtr b0, dword start, dword end, bool memory_sharing)

getNumberOfTypes and SDFRBlock::getBBlock().

This commit allows the application
to easily traverse the layout 4 format.

Some changes to File::fsize() and open

This reverts commit b44aff88.