Add more missing std qualifiers and includes of iostream header

After moving from working with CMSSW_7_0_0_pre3 to working with CMSSW_7_0_0_pre4, I discovered several more packages that would not compile against ROOT6 because of missing std qualifiers or missing includes of <iostream>.  This purely technical request fixes those packages.  In one place, I also changed two includes of ROOT headers to use quotes instead of angle brackets, as they are not system headers.

Please bypass signatures, as this is purely technical.