Update comment schema

[danielpassos]

This PR:

• Remove comments from Meme (type and query)
• Add a new Query (comments by memeid)
• Add Owner relationship from Comment
• Fix Owner relationship on Meme (from Array to a single type)
• Fix responseMapping for all postgres querys
• Probably something else I can't remember right now

[wtrocki]

@danielpassos Changes looks great. I have no specific comment, but it's best to hold off as we do not have this replicated for IOS.

[wtrocki]

Going to create ticket to do IOS update.

[wtrocki]

let's rebase it later and get that in after demo together with android updates.

[wtrocki]

Good stuff. Do we need to udpate proposal?
Let me known when you will be happy for me to check that again

[danielpassos]

@wtrocki It's ready for review. I already have changed the Android and going to do the same on iOS.

[wtrocki]

Good to be merged. I want to push that to community cluster for wider tests

[wtrocki]

Once merged let's put that on community cluster so we will benefit from that on mobile clients.

[danielpassos]

@darahayes Any thoughts? Should I merge it?

[darahayes]

@danielpassos no problems with this PR. Just one question. Why remove comments from the meme type?

[danielpassos]

@darahayes From the memeolist app perspective:

1. I don't know if the comment will be showed (you need to go to the comment screen), so why retrieve the comment with the meme and fire 1 comment select for each meme?
2. When a new comment is added it will not be displayed in any app without reloading all memes because comments were in the meme type/query

[darahayes]

@danielpassos makes perfect sense. LGTM