Load theme customizer

Added line to funcitons file to load theme cusotmizer include
Replace logo and site name/decsription with action

The theme customizer will populate this section hooking into the action
Header styling

Add styling for logo and site title/description, including styling
dependant on options selected in theme customizer
Theme customizer support

Add theme customizer support, plus:
- logo upload and positioning
- contact details for placing in header

More to be added including colours and fonts