Stacked Git 1.1

The marquee feature of StGit 1.1 is preliminary support signed patches.
StGit now respects Git's commit.gpgsign configuration option to create
signed patches (commits).

Removed

Added

• StGit GPG-signs patches when commit.gpgsign is set (#12)
• Support core.hooksPath in git config
• Add -C option for stg import and stg fold (#18)

Changed

• Allow importing mail and series from urls (#94)
• stg refresh --edit may also use --diff and --diff-opts (#98)
• stg goto allows sha1 of a patch instead of patch name (#93)

Fixed

• Repair hang in stg pull -m, stg goto -m, and stg push -m
• Repair stg mail to show diffstat of whole series (#104)
• Repair MANIFEST.in to include AUTHORS.md and README.md files