Modify curl statements to use double quotes in shell commands
Modify curl statements to use double quotes in shell commands

Single-quoting words is a OSX-specific behavior, while double-quotes will work on both OSX and any other Linux-like shell.

Ideally, we can remove all the `os.system` calls all together, and use python's built-in HTTP library rather than shell-executing `curl`.
But this is a good start.

silasary/StackIt,poppu-mtg/StackIt