[platform-core-dev] Changes to filesystem API

[John Arthorne <John_Arthorne@xxxxxxxxxx>]

I have made some changes in HEAD to
the API of org.eclipse.core.filesystem introduced earlier this week.  I
have moved the methods from FileSystemCore and the constants from IFileStoreConstants
to the new class "EFS".  This makes client code much more
compact when dealing with the option flags in IFileStoreConstants (with
a nod to SWT).  The old class and interface have been deprecated,
and I will delete them before the next I-build.  This plugin is not
yet in any I-build so I'm hoping the impact will be minimal.