Kuldeep Borkar

Added logic gates xor and xnor in Boolean Algebra

1

### Describe your change: * [x] Add an algorithm? * [ ] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x]...

### Describe your change: * [x] Add an algorithm? * [ ] Fix a bug or typo in an existing algorithm? * [x] Documentation change? ### Checklist: * [x] I...

### Describe your change: * [x] Add an algorithm? * [ ] Fix a bug or typo in an existing algorithm? * [x] Documentation change? ### Checklist: * [x] I...

Implemented logarithmic transformation of image in digital_image_processing

1

### Describe your change: * [x] Add an algorithm? * [ ] Fix a bug or typo in an existing algorithm? * [x] Documentation change? ### Checklist: * [x] I...

Added mirr function in financial_math.jl

4

Modified IRR which was not included in financial_math.jl is implemented now via `present_value` Fixes #61

moic returns a string instead of NaN

4

When no Positive or Negative values are provided to the function `moic` it will return a string that No Positive or Negative values are Provided instead of returning `NaN`