Modified groupTotals function to calculate number of players in group

# Changes #

### index.html ###
- I actually don't know how the script lines in this got changed. I didn't touch this file so I'm thinking maybe it somehow got picked up as a change from a merge I did. Either way, we can throw it back in if we need it.

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### Changed the 'MyCloudCode' folder to 'cloud-code'.

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### cloud/main.js ###
- Modified the **groupTotals()** function so that numbers of users in a respective group is also stored.
- Now as I loop through score data for a given group, I'm creating an array of unique user IDs and store the length of that array in the **players** column.
haha, all good.