bump version, merge pull request iterative#38 from bmorledge-hampton1…

…9/devel

bump version, merge pull request iterative#43 from iterative/preamble

bump version, merge pull request iterative#39 from iterative/devel

bump version, merge pull request iterative#36 from iterative/devel

Merge pull request iterative#35 from iterative/devel

next release v1.3.6

bump version, merge pull request iterative#31 from iterative/devel

Merge pull request iterative#27 from iterative/devel

bump version, merge pull request iterative#26 from iterative/devel

fix `add_argument_to(subparser)`

bump version, merge pull request iterative#23 from iterative/devel

fix bash>=4.4 bad substitution

bump version, merge pull request iterative#21 from iterative/devel