Add CHANGELOG
Fix ActiveConcern::InstanceMethods deprecation warning

This fixes a deprecation warning that began after I upgraded a project
to Rails 3.2. As the warning says, there is no reason to use the
InstanceMethods module since instance methods will get included without
any help from ActiveConcern.
Add tags_before_type_cast method
Add specs for value_before_type_cast
Update README
Minor pedantic spec readability
Move spec fixtures to their own file
Changelog
Use debugger gem for 1.9
Travis CI setup
Fork installation instructions in README. Closes #10
Mm, seems like `--without development` excludes gemspec dev deps too
Keep spec task from choking when debugger isn't available
Mongoid 2.1.8 changed the return type of ModelClass.defaults
Merge pull request #9 from sandersch/integration

Fix ActiveConcern::InstanceMethods deprecation warning

* sandersch/integration:
  Fix ActiveConcern::InstanceMethods deprecation warning
Merge ches/integration into andresf/integration