Auto merge of #962 - ebfull:2mb-blocks, r=ebfull
Auto merge of #962 - ebfull:2mb-blocks, r=ebfull

Increase block size limit to 2MB.

http://gavinandresen.ninja/a-guided-tour-of-the-2mb-fork

Closes #765.

bitcoinsSG/zcash,bitcoinsSG/zcash,bitcoinsSG/zcash,bitcoinsSG/zcash,CTRoundTable/Encrypted.Cash,CTRoundTable/Encrypted.Cash,bitcoinsSG/zcash,CTRoundTable/Encrypted.Cash,CTRoundTable/Encrypted.Cash,CTRoundTable/Encrypted.Cash,CTRoundTable/Encrypted.Cash,bitcoinsSG/zcash