Resolve "Url of submodule should be relative on Gitlab server"

See merge request !376

bridge_api.get_account_posts "by comment" optimization.

See merge request !373

Follower and following names validation and type check

See merge request !364

Vote muting and other small fixes

See merge request !371

Merge branch 'vote_muting_and_other_small_fixes' of gitlab.syncad.com:hive/hivemind into vote_muting_and_other_small_fixes

[Fix] get_account_reputations no longer fails with error when account_lower_bound is skipped; also added real default value for limit (1000)
[Fix] bridge_get_ranked_post_by_trends_for_observer_communities now validates observer like other functions of the same family
[Fix] all VOLATILE get_ranked_post related SQL functions turned into STABLE

Removed delta calculations from follow.py. Follower/following calculation moved to dedicated SQL function.

New tests for `condenser_api.get_state`

See merge request !351

issue #91: incorrect results when initial sync started not from scratch

See merge request !354

fix incorrect volatile sql function type

See merge request !366

condenser get trending tags opt

See merge request !365

Changes in index definitions, to significantly speedup 'condenser_api.get_trending_tags' call. Dedicated index created: hive_posts_category_id_payout_plus_pending_payout_depth_idx
Other indexes (mostly used by bridge_api.get_ranked_posts) has been extended by WHERE condition to eliminate rows does not matching conditions. This way indexes size has been significantly reduced.

Recreate table deps_saved_ddl when doing db upgrade

See merge request !360

Cast all follow name data to string. Should protect against setting non string data types as names in follower and following

This reverts commit 4a9e1e14.

get account posts by feed fix

See merge request !362

branch 'bw_get_account_posts_by_feed_fix' of gitlab.syncad.com:hive/hivemind into bw_get_account_posts_by_feed_fix

Reimplemented condenser_api.get_discussions_by_feed to reuse bridge_api SQL function and match previous behavior