v0.1.15

ITensors v0.1.15

Diff since v0.1.14

Closed issues:

• Move siteinds function (#261)
• Define TagType(::AbstractString) (#400)
• Incompatibility with DataFrames.jl (#437)

Merged pull requests:

• Add multi-site op support (#444) (@mtfishman)
• Customization of siteinds and siteind (#446) (@emstoudenmire)
• Remove parenthesis from AutoMPO syntax from tests and examples (#448) (@emstoudenmire)
• Update state system to use StateName (#449) (@emstoudenmire)