Merge pull request #52 from saad-khan-rind/add-saturation-and-contrast-slider

Add slider for final contrast and saturation in case of original effect.

Merge pull request #51 from saad-khan-rind/develop

Merge pull request #50 from saad-khan-rind/bug-fixes

Merge pull request #49 from Jacob26502/fix-playlist-blur

change version code.

update readme

update readme

add proper management of existing playlist.

Fix a bug where reverse halftone scenario was not handled.

try to add new method to edit existing playlist.

change message on buttons

fix blur radius for next image

Merge pull request #44 from saad-khan-rind/halftone-effect

Update Readme