Add instruction for overriding layouts for all static pages

There's nothing in the documentation yet about changing the layout for all static pages so I added it.

Spelling change

change HighVoltage to High Voltage to be consistent with the rest of the guide

Add instruction for overriding layouts for all static pages

There's nothing in the documentation yet about changing the layout for all static pages so I added it.
Merge branch 'patch-1' of github.com:daryllxd/high_voltage into patch-1