Update Ninja.md
Update the Ninja docs to call out one limitation of Shake
Merge branch 'master' of https://github.com/ndmitchell/shake
Improve the documentation for getDirectoryFiles
#15, Ninja: Correct the logic for what gets built by default
Add some more test helpers
Add some ninja tests
#16 Ninja, change how environments are handled, more Ninja compatible
Ninja test, allow real to specify to use the actual Ninja program
Ninja test, minor reordering of definitions
Update the two ninja tests to work with real ninja as well
Add assertNonSpace to the test suite
Add a test for #16
Include the Command module by default
Note that systemCwd and systemOutput are going to be going away
Avoid using systemOutput in the docs
Improve the ... conversion, if you are using cmd as the function, change it to [""]
Change to using cmd everywhere instead of system' in the tests
Change the docs to mention cmd throughout
Change to running better travis tests, using a shell script