v0.1.0

MPSKit v0.1.0

Closed issues:

• Some renaming suggestions (#1)
• gauge flag (#2)
• thread safety (#4)
• setindex should modify centerpos (#5)

Merged pull requests:

• WIP: various changes (#3) (@Jutho)
• Finitemps view (#6) (@maartenvd)
• Adding Grassmann gradient optimisation (#7) (@mhauru)
• Improve the design of the GradientGrassmann struct and its constructor (#8) (@mhauru)
• Cached finitemps (#9) (@maartenvd)