Surrounded function definitions with code that checks to see if the function is already defined. This change allows for easier child theme development.

Note: this change was done use regular expressions; only basic testing was done to ensure  problems didn't exist.

Expressions:
Find: ^function (?'functionName'[^[\s(]*]*)(?'functionCode'.*?)^\}
Replace: \nif\( !function_exists\('$+{functionName}'\) \) \{\nfunction $+{functionName} $+{functionCode}\}\}