Add rtd-bot configuration file [skip appveyor] [skip travis]
Add rtd-bot configuration file [skip appveyor] [skip travis]

Part of the configuration necessary for https://github.com/apps/rtd-helper

Akasurde/pytest,hackebrot/pytest,nicoddemus/pytest,The-Compiler/pytest,alfredodeza/pytest,tomviner/pytest,RonnyPfannschmidt/pytest,The-Compiler/pytest,tomviner/pytest,nicoddemus/pytest,markshao/pytest,pytest-dev/pytest