Merge pull request #23 from PhasorM/fix/7-add-depth-of-field-effect-to-camera

Fixes #7: Adding depth of field to camera

Merge pull request #22 from sciguy-code/workingBranch

Restore output directory images and demo files

Remove unused image and demo files from output directory

Fix crash when output/ directory is missing

feat : Add __repr__ and __str__ methods to Vec3

feat: added repr and str dunder functions in vec class

docs: added docstrings to Vector class

changed `` to `

docs: add PEP-257 docstrings to Vec3 and helper functions

Fixed clamp method

feat: added clamp function for colors (#8)

Fixes #8

fix: non zero samples check