Dependency mess

Upon installing, i noticed that the project uses a lot of packages, many of which I deem unnecessary for simple usage of bdaq53. seaborn, for example, is required and used for a single plot only. pybind is listed as requirement but I do not see it used anywhere. Maybe there is a more elegant way for the dependency management. I know for some packages that are installed from pypi, that there is a [] syntax depending on what functionality you want to include in the installation.