Issue: SPR-14958

Issue: SPR-13188

Issue: SPR-11259

Apply consistent styling to new classes introduced in Spring 4.0.

- Javadoc line wrapping, whitespace and formatting
- General code whitespace
- Consistent Assert.notNull messages

Issue: SPR-10130

This is largely derived from our existing Joda-Time support, with corresponding classes wherever possible.

Issue: SPR-9641

Issue: SPR-9641

This reverts commit 45fa5082, reversing
changes made to a312d900.

Issue: SPR-10130

Refactor DateTimeFormatterFactory into two distinct classes; a general
purpose factory and a specialized FactoryBean.  These changes are
modeled after the existing VelocityEngineFactory and
VelocityEngineFactoryBean classes.

Issue: SPR-9959

Issue: SPR-7121

Added dateFormatter, timeFormatter and dateTimeFormatter properties
to JodaTimeFormatterRegistrar allowing for custom global formatting.

DateTimeFormatterFactory can be used when configuring with XML.

Issue: SPR-7121

Dependency on Joda Time when using the @DateTimeFormat annotation is
now optional. If Joda Time is not present the JDK SimpleDateFormat
will be used to parse and print date patterns. If Joda time is
present it will always be used in preference to SimpleDateFormat.

Issue: SPR-6508

This renaming more intuitively expresses the relationship between
subprojects and the JAR artifacts they produce.

Tracking history across these renames is possible, but it requires
use of the --follow flag to `git log`, for example

    $ git log spring-aop/src/main/java/org/springframework/aop/Advisor.java

will show history up until the renaming event, where

    $ git log --follow spring-aop/src/main/java/org/springframework/aop/Advisor.java

will show history for all changes to the file, before and after the
renaming.

See http://chrisbeams.com/git-diff-across-renamed-directories

added support for Instant and MutableDateTime binding to JodaTime formatting system; allow for use of @DateTimeFormat on any ReadableInstant field

SPR-6529 - DateTimeFormatAnnotationFormatterFactory calls String.isEmpty(), which exists only in JDK1.6+

Renamed org.springframework.ui.format package to simply org.springframework.format package; 'ui' is not adding any value - it makes the package name longer and also discourages use of formatters outside in other "non ui" environments where localized formatting of field values is needed.

ui.format system refining from RC1 feedback: Support for one format annotation applying to multiple field types, Printer/Parser building blocks for more flexibility, full Joda time formatting support, FormattingService as a service entry-point for clients to use