Remove Rails 2.3 support
Removing establish_connection magic, and octopus_establish_connection
is back.
- Solves #170
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.