New success and error icons with iOS7/8 style, fixes #385
Reduce file sizes with ImageOptim, see #385
Update Readme.md, Removed typos
Changed SVProgressHUDRingThickness default (4->2), this better fits the new icons
Update license due to new icons
Update README.md

Changed Cocoapods description.
Fix bug where SVIndefiniteAnimatedView would load the animated layer even when not displayed
Merge branch 'master' of https://github.com/samvermette/SVProgressHUD