new SVG icons from Tatiana. Also, very old iconsets removed.
rearranged blocks on palette
fixed encoding in license file
rewritten code related to svg/png file selection and loading in sdfRenderer
- images renderer will not query file system at all if image is in cache
- moved image cache-related code to separate inner class
made vera++ happy
Merge pull request #1244 from qreal/icons

new SVG icons from Tatiana. Also, very old iconsets removed.