AcademySoftwareFoundation#1545 Fix formatting of sample exr file in O…

…penEXRFileLayout.rst - 3rd attempt (AcademySoftwareFoundation#1587)

* Replaced the sample exr file code blocks with a grid table formatted with bytes of the sample file in one column. The value in the second column and the third column being the description of the bytes and value.

Signed-off-by: An Nguyen <annguyen@ilm.com>

* * Updated so the ascii values for the bytes are aligned to each byte.
* Gave the table a title and reduce the width to 50%

Signed-off-by: An Nguyen <annguyen@ilm.com>

* Added missing 4 bytes missing from the dataWindow value and displayWindow value

Signed-off-by: An Nguyen <annguyen@ilm.com>

* Added the sample.exr file

Signed-off-by: An Nguyen <annguyen@ilm.com>

* Annotated the attribute values more for the header. Should be a bit clearer.

Signed-off-by: An Nguyen <annguyen@ilm.com>

* Adding the sample.exr file was documented.

Signed-off-by: An Nguyen <annguyen@ilm.com>

* Added download link to the sample.exr file.

Signed-off-by: An Nguyen <annguyen@ilm.com>

* Move the download link above the table. Updated the paragraph before the table to describe the table

Signed-off-by: An Nguyen <annguyen@ilm.com>

* Move the sample.exr image into the downloads directory to match the target destination naming scheme to avoid confusion where the files go when built

Signed-off-by: An Nguyen <annguyen@ilm.com>

* Updated the table to annotate the type and literal as type.

Signed-off-by: An Nguyen <annguyen@ilm.com>

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Signed-off-by: An Nguyen <annguyen@ilm.com>