Update readme-file for 'gulp' installation instructions
Update gulp version

Running "npm install --save-dev gulp" sorted dependencies
in alphabetical order.
Fix gulp task "scripts"

Reload player and moderator scripts whenever they will be changed.
Add “connect.reload()” to both tasks, as “gulp.start()” does not have a
pipe method.
Move example index-page to distribution root

Running “gulp serve” now opens example page directly instead of the
folder listing.
Merge pull request #162 from plutonik-a/2.1.x

Development enhancements