Typo fix isaArray -> isArray for issue #10
Merge pull request #14 from AlbertoGP/typo-fix

Typo fix isaArray -> isArray for issue #10
Launch the command under a shell to get parsing of quoted
arguments and file name globbing, as in the old version that
used exec() instead of spawn()
Fixes #12 and maybe #11, alternative to pull request #13
Make argument escaping optional and turned off by default
Remove debugging message
Merge pull request #15 from AlbertoGP/spawn-with-shell-variant

Launch the command under a shell
Merge pull request #16 from mattijs/option-values

Make argument escaping optional and turned off by default
Reverse argument escaping default to true

Due to running the command in a shell arguments with spaces should be
escaped. It is still optional but defaults to true.
Added tests for escaping
Moved test dir
Merge pull request #1 from mattijs/master

Track upstream changes