cascade account and member deletion
replace 'map' with 'each' because we don't care about the result
replace map with each
Merge branch 'master' into account-deletion
Merge branch 'master' into account-deletion
Added spec for #delete_cascade .
Repair account deletion.
Added spec for atomicity of account deletion.
Transactionalize Account#delete_cascade .
Merge branch 'master' into account-deletion
Merge branch 'master' into account-deletion
member.posts may be offset for continuous fetching
case-insensitive hashtags
argument to `posts` is a hash, not a number
Merge branch 'master' into account-deletion
replace delete cascades with SQL functions
MEMBER-DELETE parameter is "username", not "member_id"
Revert "Added spec for atomicity of account deletion."

This reverts commit 20a4ac3f2bd4415b928bf511a8e2e787b388d2c2.
Atomicity is ensured as we are using SQL functions for deletion.
execute INSERT only if there are posts to be inserted
Merge branch 'master' into conditional-post-time-updated