Do not enable flyspell-mode by default

Flyspell is probably too intrusive to be enabled by default.
Functionally it also depends on system's spell-checker configuration
which is outside of the scope of Git commit mode.

Signed-off-by: Teemu Likonen <tlikonen@iki.fi>
git-rebase-insert: new command

Because we don't want to depend on Magit this has to be uglified a bit.
Because we also don't want to depend on Dash yet this has to be uglified
even more.  Closes magit/magit#1523.
Merge branch 'master' into next

Conflicts:
	git-rebase-mode.el
git-rebase-insert: use --if-let
Merge pull request #95 from tlikonen/flyspell-off

Do not enable flyspell-mode by default
Merge branch 'master' into next

Conflicts:
	git-commit-mode.el