Do not apply binary collation every time on rails boot for MySQL users

[shawnali63]

Fixes #905

Background: To fix collation issue with MySQL we added
ActsAsTaggableOn.force_binary_collation = true

Reason: With force_binary_collation = true option we execute following script every time on rails boot which is trying to update database which is not yet available.

ActiveRecord::Migration.execute("ALTER TABLE tags MODIFY name varchar(255) CHARACTER SET utf8 COLLATE utf8_bin;")

This script should be executed only once not every time when rails is booted. User must set collation by re-running migration generator or run this rake task:

rake acts_as_taggable_on_engine:tag_names:collate_bin

[matthewhively]

I wish this would get merged, the ALTER TABLE statements executed every boot is anoying.

[skaidra-bake]

Hey guys, is there an ETA for when this would get merged in? thanks