Change-Id: I2e4d1c79f57ec048d66111ed393491b7803ee3b9

while discussing the recent Sputnik launch

Change-Id: I2308e659fa36eba193edb8b628b0fec08aaf73af

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Change-Id: I33faa4b960ae78d31c026bcbd114cb7c5d5b5aea

Avoid the horrible convention of hard-coding in a C++ unit test code
addresses of data in the spreadsheet document being tested. Instead,
mark the expected (= as calculated by Excel) and calculated (by
LibreOffice) formula results, rectangular blocks of data, so that the
C++ code can easily find it, and then compare. This is much more
flexible. No need to edit hardoded row and column numbers in the C++
code when adding more test data.

The systematic.xls file has documentation on how to maintain it.

Change-Id: I4fb088fe21831dd3b3213d21916460a708aa0842

Used the same style as existing code, added a new virtual isMinOrMax()
and add some special casing in Reduction::GenSlidingWindowFunction(),
and fsim_count() and fmax_count() functions that count how many
non-NaN numbers we actually see. As such, I am not sure at all that
this is an ideal way to do this, but will have to do for now.

Change-Id: I846a8d24f4563f8fae1a45971a4ce202ed918487

Change-Id: If7326fd1242d90ff92e62d141714960476198605

Not sure why the code from f5e72070
did not produce correct results any longer. Anyway, now OpenCL
division works right in case of empty or zero cells.

Clearly I need to add unit tests to make sure this stuff keeps
working. In later commits.

Change-Id: I93b787ad5da453af1601768308fb614a332ed142

We get correct result by simplifying the code;)

No need to have the outer "if (gid0 < X)" test around the calculation
code generated by Reduction::GenSlidingWindowFunction(). The lhs and
rhs check the gid0 range themselves and that leads to the desired
result for subtraction.

While fixing this I noticed that the handling of empty cells in
division is also wrong. Will fix in another commit.

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Change-Id: I960c4ad4ffe4f0e86f3d1f0fb364296f31bf9d92

the Call() already does a check

Found with:
git grep -A 1 -w 'IsSet()'
    | grep -B 1 '.Call('
    | grep ':'
    | cut -d ':' -f 1

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