Fix a typo in a comment
Use #save! instead of #save in model tests
More assertions in MemberTest
Avoid using nested attributes in Member methods
Clean up before upgrading to Rails 4.0
Use shorter db index names

Use db index names of at most 62 characters because the maximal allowed
length has decreased by 2 in Rails 4.
Upgrade to Rails 4.0 -- initial phase
Upgrade to Rails 4.0 WIP
Use association names instead of SQL in 'joins'

Use association name symbols instead of string SQL in 'joins' for defining scopes.  I have not debugged it, but it seems Rails 4.0 stopped working in some cases with SQL strings in 'joins' method.
Do not validate presence of Payment#payable_type

Do not validate presence of Payment#payable_type because, at least in Rails 4, it fails automatic saving of associated models, and its values should be set automatically anyway.