Merge branch 'jl/status-added-submodule-is-never-ignored'

submodule.*.ignore and diff.ignoresubmodules are used to ignore all submodule changes in "diff" output, but it can be confusing to apply these configuration values to status and commit. This is a backward-incompatible change, but should be so in a good way (aka bugfix). * jl/status-added-submodule-is-never-ignored: commit -m: commit staged submodules regardless of ignore config status/commit: show staged submodules regardless of ignore config