release finish: Print more descriptive error
Finished feature 65362982/descriptive-errors.
feature start: Add --match option

From now on it is possible to filter stories to be started by a regular
expression using --match.
Finished feature 65649796/filter-backlog-stories.
feature start: Implement pagination

Only some number of stories is shown during feature start unless the
user presses ENTER. Then more and more stories are shown.

The number of stories to be shown on a single "page" is configurable and
it is kept as gitflow.pagination in git config.
Finished feature 64225186/paging.
Finished release 1.2.4 (merge into develop)
feature start: Improve error message for --match
Finished feature 67286716/regexp-error-message.
init: Fix int and str concatenation issue
Finished feature 67286694/git-flow-init-fails.
Finished release 1.3.0 (merge into master)