* Made the following changes:
->Added OpenCV library to the project
->Added functionality to detect if an image being uploaded is too dark
->Added functionality to detect if an image being uploaded is blurred
* Made corrections and changes based on gradle checkstyle requirements
* Updated gitignore to remove binary files related to OpenCV from project
* Image blurriness detection was undone. Images are checked only for being too dark now
* Removed OpenCV documentation folder containing a lot of html files
* Removed unnecessary buildScript usage in build.gradle file for opencv library and also added abi splits
* Removed OpenCV library usages and references from project
* Removed OpenCV library folder from project
