Implemented CIE76 and CIE94
Added support for specifying clustering accuracy
Move addition and division functions to INVector3SwiftExtensions
Move INVector3.identity to INVector3SwiftExtensions
Cleaner scalar division
Consistency
Remove function declarations from header
Make color diff functions internal
Update README
Fix merge conflicts
Rename objects to points in k-means
Merge pull request #15 from indragiek/color-diff

Add CIE76 and CIE94 algorithms