Mi issue 37 get discussions by trending2

added 28 commits

• aa976e49...9bf7b6ed - 27 commits from branch develop
• a7784d9e - issue#37: calculate hot and trending at the end of initial sync

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Just a side note - trend and hot update during regular block processing needs extending data structures by block_num column, to catch votes created/updated in currently processed block range.

I added an issue: #58 (closed)

merged

mentioned in commit 7f237953