Remove merged dependencies from magit-pkg.el
Merge pull request #1667 from cichli/patch-1

Remove merged dependencies from magit-pkg.el
AUTHORS.md: update list of contributors
magit-get-submodules: new function
magit-insert-{unpulled,unpushed}-module-commits: new functions
magit-insert-{unpulled,unpushed}-module-commits: use independent types
magit-get-submodules: return just the path
magit-submodule-fetch: new command