Remove Rails 2.3 support
Merge pull request #171 from tchandy/solve-170

Solving #170 - octopus_establish_connection is back.
Fixing #164 and Adding more spec for named_scopes
Octopus 0.5.0
Merge branch 'remove_rails2_support' of https://github.com/ragalie/octopus into ragalie-remove_rails2_support

Conflicts:
	ar-octopus.gemspec
	lib/octopus.rb
Removing rails2 migration code
Updating readme
Removing rails 2.3 upgrade instructions
Use Mysql2 adapter instead of Mysql
Cleaning source code by removing Rails 3 checks
Removing old rails2 code
Removing Octopus::Logger. Please use the LogSubscriber
Fixing spec suite after the removal of Logger
Organizing Rails version specific code
Removing OctopusModel. It doesn't seems to be used in the lib.
Octopus 0.6 will not support Rails 4
Improving spec config file
Octopus 0.6.0
Upgrading rails version of the SampleApp to Rails 3.2
Upgrading cucumber / rails fixes on SampleApp