[build,scripts,data] Rename nosetests specific mark expression to be more generic and enable pytest equivalent

Allows extra pip-installable packages to be installed in every newly created environment

See merge request !194

[scripts/create] Implement --pip-extras option to allow the user to install extra pip-installable packages on every created environment

Fix var name in conda_build_config.yaml

See merge request !193

Slightly bump bob/beat-dev to add pytest support

See merge request !192

Add an alternative command to nightlies

See merge request !190

This is like nightlies with resume.
You can avoid rebuilding all packages.

Add a sphinx command to help with migrating to sphinx 3

See merge request !188

[conda-build] Update bob-devel version

See merge request !189

Add Anaconda compilers during bdt create

See merge request !183

[nightlies ci] remove redundant variables from builds

See merge request !187

[conda_build_config] Upgrade numpy and mkl to be compatible with the latest bob-devel

See merge request !186

Add make to the list of dependencies

See merge request !185

Use the new docker image in nightlies as well

Closes #61

See merge request !184

This ensures packages installed from source in the environment are ABI
compatible with the conda environment packages

Bob ip view dependencies

See merge request !182

[conda_build_config] fix zc varaiable names

See merge request !181

[conda_build_config] Update bob-devel and its respective pins

See merge request !180