testing on 1.9.3, upgrade of rails

This solves several problems when running on 1.9.3 that I found:

Fixed by removing ruby-ole in Gemfile and upgrading spreadsheet:
"undefined method `new0' for Ole::Types::FileTime:Class"

Fixed by upgrading mysql2:
"dyld: lazy symbol binding failed: Symbol not found"

Fixed by upgrading paperclip:
"gems/cocaine-0.2.0/lib/cocaine/command_line.rb:94: Use RbConfig instead of obsolete and deprecated Config."

Before this can be merged, there is a problem with config/initializers/01_nucore.rb that causes the tests to fail unless commented out that I wanted to discuss:
"config/initializers/01_nucore.rb:30: warning: class variable access from toplevel"

Also, there is a warning regarding mocha:
gems/activesupport-3.0.20/lib/active_support/test_case.rb:14: warning: already initialized constant Mocha