Make fetch-thirdparty-deps.ps1 work on more Windows platforms.
Revert to stable SharpFont version 2.5.0.1
Revert to SharpFont 2.5.0.1 for Linux and OSX, too
Merge pull request #7205 from ScottNZ/nuget

Make fetch-thirdparty-deps.ps1 work on more Windows platforms.
Make production type hotkeys configurable.
Use travis_retry to reduce the nuget timeout errors.
Merge pull request #7216 from pchote/travis-retry

Use travis_retry to reduce the nuget timeout errors.
Merge pull request #7212 from reaperrr/stable-sharp-dep

Revert to stable SharpFont version 2.5.0.1
Merge pull request #7215 from pchote/production-hotkeys

Make production type hotkeys configurable.
Make OccupiedCells implementations return arrays.

Since there are only one or two items, it's cheaper to return a concrete collection and avoid the overhead of the compiler generated state machine.

This in particular speeds up Shroud.GetVisOrigins when dealing with Mobile.OccupiedCells, as the expensive CanEnterCell call is made only once rather than twice.