Preparing for 3.0.11 release
Update .travis.yml
Prefix newly added method to avoid breakings people's apps.

See
https://github.com/rails/rails/commit/378ce0e89c498e2844aef0b184c4fe8610d53b72

Fixes #3921.
Don't notify campfire when the build keeps passing
Merge pull request #4031 from arunagw/3-0-stable

3 0 stable travis sync
bump up rack version to the one that includes the Hash DoS fix
Merge pull request #4246 from amatsuda/hashdos_30

bump up rack version to the one that includes the Hash DoS fix
Fixed failing test for ruby-1.8.7-p357

See #4292
Merge pull request #4372 from arunagw/fixed_failing_test

Fixed failing test
Merge pull request #4514 from brainopia/update_timezone_offets

Update time zone offset information
Bugfix circular reference while saving has_one relationship
Test for circular reference while saving has_one relationship
fix output safety issue with select options
add AS::SafeBuffer#clone_empty
use AS::SafeBuffer#clone_empty for flushing the output_buffer
Merge commit 'v3.0.11' into 3-0-stable
updating RAILS_VERSION
Fixed typo in composed_of example with Money#<=>, was comparing amount itself instead of other_money.amount
Ensure [] respects the status of the buffer.
Merge branch '3-0-stable-security' into 3-0-12

* 3-0-stable-security:
  Ensure [] respects the status of the buffer.
  use AS::SafeBuffer#clone_empty for flushing the output_buffer
  add AS::SafeBuffer#clone_empty
  fix output safety issue with select options