README update. Use YYYY-MM-DD format in NEWS.

[ci skip]

NEWS

@@ -9,7 +9,7 @@ master:
   s3_region may be nested in s3_credentials, and (if not nested in
   s3_credentials) it may be a Proc.
 
-4.3.1 (9/9/2015):
+4.3.1 (2015-09-09):
 
 * Backport of bugfix to `remove_column`, so it works in Rails 3 and 4
   c740fb171fe2f88c60b999d2a1c2122f2b8f43e9
@@ -18,7 +18,7 @@ master:
 * spec deprecation warnings and failures
 * README adjustments
 
-4.3.0 (6/18/2015):
+4.3.0 (2015-06-18):
 
 * Improvement: Update aws-sdk and cucumber gem versions.
 * Improvement: Add `length` alias for `size` method in AbstractAdapter.
@@ -31,7 +31,7 @@ master:
 * Ruby Versioning: Drop support for 1.9.3 (EOL'ed)
 * Rails Versioning: Drop support for 4.0.0 (EOL'ed)
 
-4.2.4 (6/5/2015):
+4.2.4 (2015-06-05):
 
 * Rollback backwards incompatible change, allowing paperclip to run on
   Ruby >= 1.9.2.

README.md

 Paperclip
 =========
 
-[![Build Status](https://secure.travis-ci.org/thoughtbot/paperclip.svg?branch=master)](http://travis-ci.org/thoughtbot/paperclip) [![Dependency Status](https://gemnasium.com/thoughtbot/paperclip.svg?travis)](https://gemnasium.com/thoughtbot/paperclip) [![Code Climate](https://codeclimate.com/github/thoughtbot/paperclip.svg)](https://codeclimate.com/github/thoughtbot/paperclip) [![Inline docs](http://inch-ci.org/github/thoughtbot/paperclip.svg)](http://inch-ci.org/github/thoughtbot/paperclip) [![Security](https://hakiri.io/github/thoughtbot/paperclip/master.svg)](https://hakiri.io/github/thoughtbot/paperclip/master)
+[![Build Status](https://secure.travis-ci.org/thoughtbot/paperclip.svg?branch=master)](http://travis-ci.org/thoughtbot/paperclip)
+[![Dependency Status](https://gemnasium.com/thoughtbot/paperclip.svg?travis)](https://gemnasium.com/thoughtbot/paperclip)
+[![Code Climate](https://codeclimate.com/github/thoughtbot/paperclip.svg)](https://codeclimate.com/github/thoughtbot/paperclip)
+[![Inline docs](http://inch-ci.org/github/thoughtbot/paperclip.svg)](http://inch-ci.org/github/thoughtbot/paperclip)
+[![Security](https://hakiri.io/github/thoughtbot/paperclip/master.svg)](https://hakiri.io/github/thoughtbot/paperclip/master)
 
 - [Requirements](#requirements)
-  - [Ruby on Rails](#ruby-and-rails)
+  - [Ruby and Rails](#ruby-and-rails)
   - [Image Processor](#image-processor)
-  - [file](#file)
+  - [`file`](#file)
 - [Installation](#installation)
 - [Quick Start](#quick-start)
   - [Models](#models)
@@ -21,16 +25,16 @@ Paperclip
 - [Security Validations](#security-validations)
 - [Defaults](#defaults)
 - [Migrations](#migrations-1)
-  - [Table Definition](#table-definition)
+  - [Add Attachment Column To A Table](#add-attachment-column-to-a-table)
   - [Schema Definition](#schema-definition)
-  - [Vintage Syntax](#vintage-syntax)
+  - [Vintage syntax](#vintage-syntax)
 - [Storage](#storage)
   - [Understanding Storage](#understanding-storage)
 - [Post Processing](#post-processing)
 - [Events](#events)
 - [URI Obfuscation](#uri-obfuscation)
-  - [MD5 Checksum / Fingerprint](#md5-checksum--fingerprint)
-  - [File Preservation for Soft-Delete](#file-preservation-for-soft-delete)
+- [MD5 Checksum / Fingerprint](#md5-checksum--fingerprint)
+- [File Preservation for Soft-Delete](#file-preservation-for-soft-delete)
 - [Custom Attachment Processors](#custom-attachment-processors)
 - [Dynamic Configuration](#dynamic-configuration)
   - [Dynamic Styles](#dynamic-styles)