tools/pipbot: Untabify run_extern()
tools/pipbot: Refactor new branches to use git API

Issue #193.
tools/pipbot: Print summary in each function

Issue #193.
tools/mkrelease.sh: Don't perform git branching

Issue #193 and #203.
tools/pipbot: Refactor new releases to use git API

Issue #193.
tools/pipbot: Refactor pause to use git API

Issue #193.
tools/pipbot: Update pause documentation

Issue #193.
tools/pipbot: Refactor branch name getter logic

Issue #193.
tools/pipbot: Update finish documentation

Issue #193.
tools/pipbot: Refactor finish to use git API

Issue #193.
Merge branch 'feature/193'