v0.5.1

• update docs and comments
• add ScrollBar support to List
• rework ScrollBar
• add bind polyfill (only for dev mode)
• add min/max check to ProgressBar
• correct ProgressBar styles
• correct focusable flag inheritance in ProgressBar and ScrollBar
• rework Input
• add eslint rule indent
• update gulp-jade, gulp-eslint and less packages
• remove eslint warnings
• correct navigation method assignment for List and Grid
• add Input cursor animation