Add batch/filter options to /v1/profile

[ronoaldo]

The current profile endpoint, /v1/profile/username, could be reworked to allow batch get / filter when no username is specified.

New /v1/profile/ endpoint that can return a list of profiles with the filter criteria via query string values:

• ?profile=user1&profile=user2...&profile=user3: return the specified profiles back.
• ?guild=guild1: return profiles from the specified guild name.

If no query string values are specified, return an empty result.

To some extent, this proposal returns an unidimensional array equivalent of the current api for the first filter when only one profile is set.

[ronoaldo]

I'm no longer maintaining this project.