Merge pull request #98 from worldintime/iba_94_case_insensitive_user_name

Case insensitive user name
add created at to each message
fix spec
fix test according to pull request comments
conversation detail fix
Merge pull request #100 from worldintime/iba_96_add_created_at_for_each_message

add created at to each message
Update conversations_controller_spec.rb
ability to remove conversation
fixes
accident removal
fix test according to pull request comments
resolve conflicts
ability to remove conversation
fixes
accident removal
fix test according to pull request comments
Update conversations_controller_spec.rb
ability to remove conversation
accident removal
rebase