Made readme.md more clear and fixed bug in installer.sh#2

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Commits on Jan 24, 2016

README.md was unclear before, made mention of "Fresh SD Card" and showed some Linux commands for provisioning it without clarifying that it should be done ON the RPi with a freshly imaged Raspbain.
aplocher
committed
Fixed bug in installer.sh when running it a second time. It would display an error at bootup: unexpected token "fi"
aplocher
committed
Fixed bug in installer.sh and fixed fat fingered extra letter (my bad)
aplocher
committed