* add the index calculation at difital_image_processing file
* make changes at index_calculation
* update the variables to self variables at functions
* update the word wrap in comments at index_calculation
* add the hamming code algorithm
* Wrap long lines
* Update gaussian_filter.py
Changed embedded for loops with product. This way range(dst_height) is called only once, instead of being called $dst_height.
* Update gaussian_filter.py
fixed missing width
* add gaussian filter algorithm and lena.jpg
* add img_convolve algorithm and sobel_filter
* add canny edge detection algorithm and modify sobel_filter
* format to avoid the backslashes
