Initalise

Meta
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+ Add note to README noting repo changes
+ Add note to README with link to style guide

Resources
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+ Add Semantic UI
* The .zip file has been committed for convenience
+ Add home.html as a placeholder

PHP
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+ Add index.php as an entry point
+ Add defaultSettings.php as a placeholder for configurations
+ Add bootstrap.php to initialise everything
+ Add walkingTourCreator.php as a central class