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Currently the default pattern is mediumDate but in a other language like german the default pattern should be ddMMyy

Current behavior
Overwrite pattern on every pipe:

<p>{{ myDate | date:'ddMMyy' }}</p>
<p>{{ myOtherDate | date:'ddMMyy' }}</p>
<p>{{ otherVar }}</p>
<p>{{ myOtherOtherDate | date:'MMyyDD' }}</p>

Expected/desired behavior
There should be a variable like LOCAL_ID shich can be overwritten:

@NgModule({
    providers: [
        {provide: LOCAL_PIPE_DATE_PATTERN, useValue: 'ddMMyy'},
    ],
})
export class AppModule {}

So we can use:

<p>{{ myDate | date }}</p>
<p>{{ myOtherDate | date }}</p>
<p>{{ otherVar }}</p>
<p>{{ myOtherOtherDate | date:'MMyyDD' }}</p>

What is the motivation / use case for changing the behavior?
In some languages like german we want dates like '2016-02-01' written '01.02.2016' so, it would be much better to define a default pattern per "language" instead of set the pattern on every pipe.

Please tell us about your environment:

• Angular version: 2.0.0-rc.6
• Browser: [all]
• Language: [all]