Update TSP solver and gpflow optimizer

• Update TSP solver with args to define optional start and end locations for the solution path(s)
• Update the gpflow optimizer with args to select the optimization method with a string. The method has to be one of the available methods from scipy minimize and tensorflow optimizers

Package requirements into the release file

v1.0.1

Update version to 1.0.1

SGP-Tools v1.0.0 open sourced!!

Update setup