update project settings to swift 5

Update README.md

update swift version

adding swift version

updating podspec

Update README.md

Merge branch 'Legoless-master'

Update project to Swift 4.2

Update ProcessLoadingView.swift

Update README.md

Merge remote-tracking branch 'origin/master'

update pod spec

Update README.md

rename reverse action method to reset

add a completion block to start method