FIX test for Windows platform.
REFACTOR: command_shell and relocate behave4cmd0 outside of steps dir to simplify reuse as steplib in several places.
Support multiple formatters
Remove DISABLE_MULTIPLE_FORMATTERS
Merge branch 'multiple_formatters' of https://github.com/roignac/behave into roignac-multiple_formatters
ENSURE: Non-existing dirs for outfile(s) are created.
FIX minor omission in Ctor.
FIX-TYPO: In formatters attribute usage.
FIX: Problem in get_formatter() code and 'simplify' some.
UPDATE: behave4cmd0 w/ file/file-content related steps.
Add default_format option for configfile.
Resolve some issues related to multiple formatters in configfile/command-line.
Add self-tests.
Add behav4cmd0
UPDATE: #154, #47
UPDATE: command-line/configfile reference after 'default_format' was added.