Move Contracts, P2SH and multisig to a separate section
Revised contracts references out of TX Malleability section
Merge pull request #43 from harding/devcontracts

Revised contracts references out of TX Malleability section
Move P2SH/Multisig back under Transaction
Add TODO comment about multisig/P2SH
Use "Complex transactions" instead of "Contracts" in the Transaction subsection
Move "Standard transactions" under "P2PH script validation"
Merge pull request #45 from saivann/devcontractsp2sh

Move P2SH/Multisig back under Transaction
Apply small text improvements
Merge pull request #42 from saivann/devcontracts

Move Contracts to a separate section