use puma.

Using thin and unicorn is silly
Specify a version for puma and bundle
Fixes FeedService tests to actually test things.

The original tests stubbed the private methods which means they mostly
just tested ruby's precedence order. :) Private methods are forced
integrations... we have to allow them to operate in turn in order to
assess behavior.
Removing TestHelper from FeedService tests.

This removes the overhead imprint.

Tests run at quick speed:

$ rake test:file[test/services/feed_service_test.rb]
test/services/feed_service_test.rb
Rack::File headers parameter replaces cache_control after Rack 1.5.
Run options: --seed 41627

.....

Finished tests in 0.015902s, 314.4225 tests/s, 377.3070 assertions/s.
Fixes the tests so that they can execute on their own.

Speed benchmarks:

```
$ rake
test:file[test/services/subscriber_to_feed_data_converter_test.rb]

6 tests, 1 assertions, 1 failures, 5 errors, 0 skips
```

```
$ rake
test:file[test/services/subscriber_to_feed_data_converter_test.rb]

Finished tests in 0.005167s, 1161.2156 tests/s, 2128.8953 assertions/s.

```

Fair enough.
Adds rels for user profile links to followers, following, and updates.

According to ALPS, the following rels are used on <a> tags:

messages-me: Applied to an A tag. A reference to a list representation
of all the messages posted by the designated user.

users-friends: Applied to an A tag. A reference to list representation
of the designated user's friend users.

users-followers: Applied to an A tag. A reference to list representation
of the users who follow the designated user.
fixes cve-2013-1854, updates twitter gem so new installs work.
Merge pull request #754 from jrgifford/fixing-cve-2013-1854

fixes cve-2013-1854, updates twitter gem so new installs work.
Updates twitter gem and increases minor patches of all other gems.
Merge pull request #752 from wilkie/bugfix/update_twitter_gem

Updates twitter gem and increases minor patches of all other gems.
Merge remote-tracking branch 'upstream/use_puma'

Conflicts:
	Gemfile.lock
Merge remote-tracking branch 'wilkie/bugfix/feed-service-tests'
Merge remote-tracking branch 'wilkie/bugfix/subscriber_to_feed_data_converter_test-speed'
Merge remote-tracking branch 'wilkie/bugfix/alps-missing-rels'
Updates twitter gem.
Updates omniauth-twitter gem to first major version bump.
Upgrade mongo just because.
Updated rails, set ratom to point to a patched git branch until it is merged.
Merge pull request #768 from jrgifford/updating-rails

Updated rails, set ratom to point to a patched git branch until it is merged.
Specify ruby 1.9.3 in the Gemfile.

Heroku now uses ruby 2.0.0 as the default, but we appear to have some compatibilty issues somewhere (see https://github.com/hotsh/rstat.us/issues/772).

Heroku will use the ruby specified in the Gemfile, so this should make for a more seamless deploy experience until we fix the compatibility problem(s).