Substantially revised the Scroller component. This version supports
the vertical,horizontalScrollPolicy properties (as in Halo) and no
longer includes a vestigal "viewportHolder" skin part. Layout is
now handled programatically, instead of with MXML constraints.

There are still some limitations for the "auto" scroll policies, and
some other minor layout problems. There is no documentation (yet).

Corrected minimum size calculation in Vertical,HorizontalLayout
for the cases where an explicit rowCount or columnCount was specified.
The measured min sizes are now only based on the first rowCount
or columnCount (visible) layout items.

QE: Scroller can now be tested
Doc: No
Checkintests: Pass
Reviewer: Ryan

Merge: 3.0.x@3105 to trunk
- Fixes SDK-15764 and SDK-15765 for trunk as well.

SDK-15764, SDK-15765 -- Two long standing Ant task bugs.
- Ant Tasks fail when setting fork="true" and there are spaces in the path name
- Setting fork="true" in Ant Tasks leads to warning

The issue with spaces is that forked tasks construct a stringified commandline, since Java doesn't allow you to pass real String[] to a new process. When not forking, we can pass the original String[], which makes spaces irrelevent. So the fix uses a Commandline.toString(String[]) which is designed to wrap arguments with spaces correctly with quotes, so the commandline tokenizes correctly.

Bugs: SDK-15764 SDK-15765
QA: This affects ant calls for _all_ FlexTasks where fork=true. It would be great if we have tests for both fork="true" and "false" where we tested paths and arguments with and without spaces -- off the top of my head, good ones to try: +flexlib=/path/with spaces/, -define=CONFIG::foo,"bar with spaces", and any other arguments you can think of. Also very important: Test passing space arguments without quotes, with single quotes, with double quotes, with a mixture (illegal), and with a mixture escaping the inner set of quotes (not sure if this should work or not, probably a stupid case to test unless quotes are allowed in paths).
Doc: No
Reviewer: Pete

More Marshal Plan related asdoc updates

Fixing UITextFormat's copyFrom routine to account for the rest of TextFormat properties it wasn't copying.

Feature: Message throttling - message frequency limits subfeature.
QA: Yes
Doc: Not yet
Checkintests: Pass

Details: This is the BlazeDS client part of the message frequency limits sub-feature of Message throttling feature. This check-in adds the ability for the Consumer to specify a maxFrequency globally or per-subscription.

Removing 'RemoveItems' since it's currently not leveraged by States code-gen and nobody is using it as an override in other contexts.
QA: No