#4 Add include guards

[Alfred John Burgess]

Objective

Add include guards to generated files

Purpose of Feature

Ensure that any structures created are included in a project only once and as needed.

Key areas of Focus

• Implement option for pragma guards
• Implement option for ifndef include guards
• Add command-line argument for controlling behaviour [1]
  • options should include { pragma, include, off }
• Add command line argument for defining the include guard shape
• Create a default header-guard shape

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Notes

1. See ticket #3 for implementation here.