Add support for spaces in file paths on Windows systems

[SetTrend]

The TypeScript jake file currently fails when the path to the TypeScript project contains spaces.

As suggested by @mhegazy I am creating this issue instead of a pull request on the fix I implemented for jakefile.js.

The fix is mainly based on adding an undocumented, yet required Node option which has already been used in the existing jakefile.js, yet only for one single call. I have amended the other calls to utilize this option.

Please refer to SetTrend/TypeScript for changes.

[jakebailey]

Just looking at old issues; the build doesn't use jake anymore, nor gulp, and the new build never constructs shell commands, so this one should definitely be fixed now.