Ability to allow user "Flag" a content

[ChialiT]

Discussion on 8/29.

We will visit the "flag" feature,
need to check the feasibility in the backend and smart contract.

Things need to take considered once we have the "flag" feature:

• when user receive "Flag", a way to reduce the tip they earn (Must to have in near future)
• how many "flag" then we delete/remove the content? (Nice to have)
• should there be a review process after many "flag"? (Nice to have)

[ChialiT]

@hackertron @NicoSerranoP @thebeyondr see above.

[ChialiT]

set this as "on hold"