Update28 may#9

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vanosg wants to merge 3 commits intoBrewPi:masterfrom

vanosg:update28May

Commits on May 29, 2016

Add forum post images
vanosg
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Commits on Jun 4, 2016

Update rpi-setup docs
vanosg
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Commits on Sep 16, 2016

First draft of spark programming docs
vanosg
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