Issue: SPR-11393

When @ResponseStatus has a reason and servletResponse.sendError() is
called, the response is committed and should no longer be written to.
After this change, the ServletInvocableHandlerMethod will mark the
response fully handled and will ignore any non-null return values.

Issue: SPR-9159

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

moved multipart and bind to web project since independent of servlet and required by new native web request parameter map

+ Updated all projects to use the re-introduced org.springframework.asm instead of org.objectweb.asm (.java, template.mf, ivy.xml, and .classpath files have been updated)
+ Finished support for @Import, including detection of circular imports