LGS launchPosition needs to be numpy.array

[dougieee]

/soapy/soapy/lineofsight.py(85):

self.config.launchPosition * self.telescope_diameter needs to be changed to numpy.array(self.config.launchPosition) * self.telescope_diameter

Also in the online documentation, would it be better to have the launch position as [0,0] instead of (0,0)? Just so the launch positions are arrays within the yaml config file.