added support for projection field

[salmanhasni]

No description provided.

[roblingle]

Added package to our /packages folder and made this change. Only other things was we needed to update package.js: add_files => addFiles, on_use => onUse, on_test => onTest.

Cheers

[boxofrox]

I don't see any activity on this package from the original team since I used it way back when meteor started.

Looks like this package is broken without this patch.
The patch preserves the use of fields if available, and falls back to projection when fields is missing.
A second user tested and confirmed the fix works in #97.
Existing functionality is left unchanged.

I'll merge. Can't say whether a release will happen automatically though. I'm just a nobody that helped out a bit early days and was given merge permission. Might need to ping the owner if it's not automated.