refactoring of paths in styles
fixed source maps conditions for styles
styles main watcher flag support
added source maps flag for styles
added "debug" flag for scripts
refactoring of scripts tasks
watcher for scripts
refactoring of sprites tasks
fixed build callbacks for styles and scripts tasks
some refactoring for watchers and sprites tasks, removed watcher stuff from sprites (cause gulp.spritesmith throws errors not to event stream)
some little refactoring of scripts tasks
fixed jshint tasks
fixed jshint tasks (rename hack), and replaced gulp-callback to native end callback in styles and scripts tasks
support dest dir for sprites tasks
support dest dir for styles tasks and fixed end callbacks for styles and scripts tasks
support dest dir for scripts tasks
updated version to r8