v0.3.0

ImageQualityIndexes v0.3.0

Diff since v0.2.5

Closed issues:

• remove ImageFiltering dependency (#10)

Merged pull requests:

• ImageQualityIndexes v0.3.0 (#42) (@johnnychen94)
• delete psnr and ssim (#43) (@johnnychen94)
• add test dependency ImageIO (#44) (@johnnychen94)
• rework entropy function using ImageContrastAdjustment (#45) (@johnnychen94)