update code climate badge.
remove bcrypt. It is not used.
Relax active_model version for rails 4.0.x
Remove jeweler as a dependency for gem build. Now uses bundler tasks for gem building.
fix gemspec
The gem's name is activemodel instead of active_model
remove pry
remove integration test against rails. Due to class name difference and mocking, it will be impractical to make this work.
use devtools gem for metrics
rubocop autocorrect
added utf8 comment
working pluggable formatter
Mostly syntax and style fixes.

* Rubocop syntax fix.
* Updated devtools.
relax metrics settings.
configure travis-ci rake task
more utf8 encoding comments.
really fix utf-8 encoding comment.
Merge pull request #7 from aq1018/devtools

Devtools
Merge branch 'master' into pluggable_formatter

* master:
  really fix utf-8 encoding comment.
  more utf8 encoding comments.
  configure travis-ci rake task
  relax metrics settings.
  Mostly syntax and style fixes.
  added utf8 comment
  rubocop autocorrect
  use devtools gem for metrics

Conflicts:
	lib/active_model/error_collecting/emulation.rb
	lib/active_model/error_collecting/human_message_formatter.rb
	spec/lib/active_model/error_collecting_spec.rb
Merge pull request #6 from aq1018/pluggable_formatter

Going to merge this in for now, since it doesn't change any existing behavior.