Adding some tests of the mkdir functionality for my own sanity.
Avoiding symbol collision.
Add some new tests
Updating some of the other tests, as they weren't quite accurate
Initial implementation, passes the tests currently committed.
Add test to ensure mkdir with permissions works as expected.

Relies on process umask being set to 0022.  If this is not the case, this test
will break.
Merge branch 'master' into mkdir
Fix the lack of newlines
Altering the order these tests run in, so we aren't left with a directory that
can't be opened the next round of testing.
Fix an incorrect comment.
Merge branch 'master' into mkdir

False conflicts, related to placement within file of new functions.

Conflicts:
	modules/standard/IO.chpl
	runtime/include/qio/qio.h
	runtime/src/qio/qio.c
Make permissions test for mkdir more portable.

As per Greg's suggestion in the review.
Forgot to add the octal conversion to the last printf in the prediff

Now the test will actually work.
Merge branch 'master' into mkdir
Merge pull request #317 from lydia-duncan/mkdir

Add mkdir to Chapel [reviewed by gbtitus]

Add the function mkdir to Chapel. Mkdir takes in a directory name to create, the permissions to create it
with, and a boolean indicating if any missing parent directories should be created first. There are two
versions: one which halts with an error message if one occurred, and one which merely returns the error
code via an out parameter.

Implementation details: the Chapel code calls out to a qio.c implementation. If the caller has indicated it
wishes to create missing parent directories, then the function will attempt to do so by traversing the
provided path and attempting to create each parent directory as it goes, ignoring errors it may encounter
(as some of them will be "this directory already exists" errors, which we do not care about). Then the
function will attempt to create the indicated directory, returning any errors it encounters in this last step.

8 tests accompany this feature, residing in test/io/lydia/mkdir/

We've decided to merge this now and implement the change suggested by Greg once he is able to advise
more, in the interest of having this function implemented by feature freeze.