Improve install scripts

[jvolker]

With the current image from https://groups.google.com/d/msg/openframeio/ulD66rL-MUs/JEvOZE9YBgAJ the user doesn't get asked about the frame rotation anymore.

The frame rotation configuration should be moved from the web install script https://github.com/OpenframeProject/openframeproject.github.io/blob/master/install.sh to install.sh of this repository.

[jvolker]

Also from https://gist.github.com/jvolker/7d61d2550261f838c473ea6f3111c458 add

# change boot mode to command line
sudo raspi-config nonint do_boot_behaviour B2

# set GPU memory to 256 to make shaders and image extension work
sudo raspi-config nonint do_memory_split 256

Maybe check the current memory split first and only increase if it is currently set to lower than 256MB. More on this here.

Should these two commands rather go to to the web install script?

[jvolker]

Sometimes I only wanted to change the rotation of the screen but had to type in the user name and data as well, which I don't always have at hand. It would be great if it were possible to configure/reset the frame configuration separately from the login credentials.

[jvolker]

Also, the rotation command in /boot/config.txt has changed from display_rotate= to display_hdmi_rotate= .