Copyediting of chapter 6, part 1
Changin Spring of 2013 to early 2013, since seasons like spring,winter mean different parts of the year in different hemispheres
Changing direction describing the merkle root. Its the transaction data that forms the 32 bytes of the merkle root.
Finish copyediting chapter 7
Finish copyediting of chapter 8
Merge branch 'minh_changes'