Avoid exceeding execution time if more images are being optimized.

It will be useful if a user is optimizing a large set of images in the loop.

Generate unique file name for destination directory(if same file name already exists)

0.0.4

Merge pull request #4 from artisansweb/generate-unique-file-name-for-…

Skip the process if the destination file has invalid extension

Merge pull request #3 from artisansweb/check-destination-image-mime-type

skip the process if destination file has invalid extension

Add Exception Class

Created a separate folder Exception which will have exception classes.

Initial Release

This is the first version of the package.