Remove unnecessary initializer and comments in Gemfile and add explicit rubyzip gem version in Gemfile with description

closes #6001

closes #5991

closes #5998

closes #5994

closes #5992

closes #5989

closes #5988

Since the Facebook API has changed and additional permissions are required for all users on a pod to cross-post, an additional 'authorized' flag is needed to be set for the Facebook service.
This flag allows either all users, one user or no users to use the cross-posting service.

Clarifies the situation for #5923, #5260 and #5085.

closes #5985

closes #5986

closes #5983

closes #5978

closes #5975

regression from 1da1c53f203e6eb9dad50872e573a4965219ef92

closes #5976

last renamed in 8386179f

closes #5970

closes #5968

closes #5967

closes #5966

- added in a836b06d
- removed in 49ea8c85

closes #5969

closes #5964

closes #5965

closes #5960

closes #5962

closes #5958

closes #5956

Fixes #5950

It seems ActiveRecord ignores .limit() if .find_each() is used to iterate the query (http://stackoverflow.com/a/6680541/1489738). Using .each() instead. Added a test.

closes #5953

closes #5951