/android/import-contacts

* rename VCFImporter to VcardImporter and VCard to Vcard

* VcardImporter.Vcard.finaliseParsing() should be renamed to finalise() to

	override Importer.ContactData.finalise(), if Java will permit us to do that

	(fnaliseParsing() throws stuff that finalise() doesn't), and should call

	super.finalise().

* rename Importer.isImportRequired() to checkForDuplicate() and make it private.

	This should be called from Importer.importContact(), which should then call

	skipContact() to update the UI and return if checkForDuplicate() returns

	false.

* ContactData.finalise should create a ContactsCache.CacheIdentifier and throw

	ContactCannotBeIdentifiedException() if that fails, which can be picked up

	in Vcard.finalise(). Importer.importContact() and the renamed

	Importer.checkForDuplicates() should use the ContactData's CacheIdentifier

	and not create their own. This will also ensure that ContactData.finalise()

	has been correctly called (or the identifier would be null).

* import a crap-load of contacts before release!

* change some public final static ints, that aren't really consts, in to enums

* create a back-end object to read/write to android. This can be overridden to

	use the new ContractsContacts API.

* add warnings when email addresses, phone numbers, etc, fail sanitisation (and

	are ignored) during the import

* add base64 decoding to support (even if to ignore) vcards with image data

* possible bug: when displaying "aborting import" toaster, make sure the back

	button is enabled and the abort button is hidden (as if abort were pressed)

	since this can happen if, say, the alarm goes off.

* in the long term, we need to save/restore state from doit/importer