Implement binary serialization and deserialization for every type

[kushti]

Serialization and deserialization already available for following types :

• Box - bytes and bytesWithoutRef methods
• GroupElement - getElement | decodePoint in global methods
• SigmaProp - propBytes (and there are options to deserialize it along with execution via executeFrom* only)
• Byte, Short, Int, Long, BigInt (numeric types) - toBytes | byteArrayToBigInt and byteArrayToLong

So there is need for:

• Box deserialization
• Header serialization and deserialization
• byteArrayToInt and byteArrayToShort
• SigmaProp deserialization
• AVLTree serialization and deserialization

[kushti]

Deserialization of everything mentioned is done in #979 . Header.toBytes done in #975

[kushti]

Serialization of everything mentioned and more done in #979 and #989.