Restored Foreach macro to keep backwards compatibility.
Removed USE_CPP11 option from options.mk.sample
Added experimental AutoMPO class which is convertible to Hamiltonian H or exp(t*H) MPOs. Still need to add support for fermions, multi-site (>2 site) iteractions, and test complex number support.
Made AutoMPO related toExpH and toMPO functions templates to make them easier to use within other templated code.
Renamed TimeStep option to TimeStepNum in gateTEvol.