Built cloud functionality to do aggregate group totals

# Changes #

### Deleted jeffs-cloud-test folder. ###

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### Parse ###
- Created **GroupTotals** data class.

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### cloud/main.js ###
- Deleted out all of the commented out code.
- Refactored some of the code in the **totals** job.
- Created the **groups** job:
  - Loops through the **GroupTotals** table and deletes all rows.
  - Pulls all group IDs from the **Groups** table (group ID instead of group name since we never got confirmation that group name would always be unique).
  - For each group ID, pulls all player event records with the respective group ID.
  - Loops over player events within the group, totals coins and minions.