Quara

Changes
- Improved computation time for converting matrix representations of a gate.
- Added two minimization algorithms, PGDM and PFISTA.
- Added a class MProcess for treating a measurement process.
- Added StandardQmpt for performing standard quantum tomography data-processing for measurement process.
- Added interface for partial use of Quara from Qiskit and Forest.
- Added interface for performing data-processing of Standard Quantum Tomography using CVXPY with MOSEK.
- Added a class Circuit for performing simulation of a quantum circuit with Qulacs.

Contributers
A total of 5 people contributed to this release.
- Takanori Sugiyama (tknrsgym)
- Tomoko Furuki (komo-fr)
- Satoyuki Tsukano (snuffkin)
- Kento Tokuhiro (rescircuit)
- Kanta Endo (kantea87)

Changes
- Improved computation time for calculating value and grad of class LossFunction, executing numerical minimization with class Pgdb, converting representations of class State, Povm, and Gate, projecting the classes into equality-constraint or inequality constraint subsets.
- Added re-estimation feature, and modified treatment of random number stream.
- Added interface for partial use of Quara from QuTiP.

Contributers
A total of 4 people contributed to this release.
- Takanori Sugiyama (tknrsgym)
- Tomoko Furuki (komo-fr)
- Satoyuki Tsukano (snuffkin)
- Kento Tokuhiro (rescircuit)

Changes
At Quara v0.1.1, we added quara.bib for clarifying how to cite, modified copyright information, and modified link to documentations.

Quara v0.1.0 is the 1st release.

Contributors
A total of 3 people contributed to this release.
- Takanori Sugiyama (tknrsgym )
- Tomoko Furuki (komo-fr)
- Satoyuki Tsukano (snuffkin )