Add option to make feature available only for sorting.

This will allow us to sort closer sounding matches higher, without polluting results with fuzzy results.
Merge pull request #184 from hightower/sort_only_features

Add option to make feature available only for sorting.
reject over map with next and compact
VERSION 0.7.5
Add :only option for limiting search fields per feature

Addresses:
https://groups.google.com/forum/#!topic/casecommons-dev/yOojbQoVdWE
Fix Generator's compatibility with Rails 3.x

(Fixes #185)
Merge pull request #183 from jonsgreen/master

Add :only option for limiting trigram search fields
Refactor :only column filtering to private method

I prefer not to do any unnecessary calculations in #initialize, so that
objects are easier to instantiate for unit testing.
VERSION 0.7.6
Escape symbol in CHANGELOG.md for consistency
Test Ruby 2.1.2 and Active Record 4.2.0.beta1
Convert specs to RSpec 3.0.4 syntax with Transpec

This conversion is done by Transpec 2.3.7 with the following command:
    transpec

* 6 conversions
    from: it { should ... }
      to: it { is_expected.to ... }

* 3 conversions
    from: == expected
      to: eq(expected)

* 1 conversion
    from: it { should_not ... }
      to: it { is_expected.not_to ... }

For more details: https://github.com/yujinakayama/transpec#supported-conversions
Add binstubs for guard and spec
Use rspec binstub in guard-rspec
Set null: false on timestamps calls

To avoid deprecation warning in Active Record 4.2
Fix future compatibility with Active Record 4.2

Use Arel::Nodes.build_quoted to quote strings if present, otherwise fall back to preexisting behavior.
VERSION 0.7.7
Don't include binstubs as binaries in the gem
VERSION 0.7.8
Remove coveralls badge

It was lying about our test coverage and making us look bad.