info command test - less strict regexp
Merge pull request #345 from vsespb/files_are_the_same_on_win32

Fix files_are_the_same test and test expected behaviour on Win32
Merge pull request #346 from vsespb/min_from_list_util

Replace min() function with one from List::Util
Merge pull request #347 from vsespb/develop

Exec command exit code and logging improvement
installed_perls sort

list, exec and some other command execute perls in ascending
order of perl version (previously order had no sense)
travis yml - add more versions
test - simple fix - code should be inside "it" block
exec command - test that format_info_output is actually called in right context
Merge branch 'perl_versions_ordering' into merge_all_active_branches
Merge branch 'travis_improvements' into merge_all_active_branches
Merge branch 'more_tests_for_exec' into merge_all_active_branches