Expand (and clean up) use of new 'setWriteSequentially' method

[melissa]

In r6976, TiffWriter was given a new method: 'void setWriteSequentially(boolean)'. The purpose of the method is to allow the calling code (e.g. ImageConverter) to specify that it absolutely will write planes in sequential order - if setWriteSequentially(true) was called, then TiffWriter and TiffSaver can make certain assumptions about the planes which can speed up the export process.

In the next release, I think it would be a good idea to:

• move 'setWriteSequentially(boolean)' to IFormatWriter
• update loci.formats.out.*Writer and TiffSaver to take as much advantage of this method as possible
• add tests to verify that the resulting files are the same, regardless of what arguments are passed to setWriteSequentially

[melissa]

(In [7482]) Moved 'void setWriteSequentially(boolean)' from TiffWriter to IFormatWriter. See #565.

[curtis]

moved to  ome:#4155