New deployment information

Today we've deployed a new version of the player and also some additions to the platform's editor. Here's the full list of changes:

1. Module group management becomes more easy and user friendly, because groups are now visible in the modules' list in the editor!  If the group is contained in a div (in the properties) it will even be collapsible.
2. There is a new module available in mAuthor. From now on you can use the Lottie Player, a lightweight vector animation player with a lot of options, commands and possibilities. This is the first module that uses the new feature of dynamic libraries embedding, so the IC Player does not contain the unnecessary files unless the module is placed in the lesson.
3. There are three changes in the Gradual Show Answers module:
   1. A fix of a bug that made the module appear in the keyboard navigation even if it was hidden.
   2. The answers to the Magic Boxes module were shown together with a Text module - it is now fixed.
   3. There was a bug of GSA working with the Points and Lines module, we've also fixed it.
4. The Eraser button in the Text Coloring module is now supported by the TTS mechanism.
5. When the getState command was executed for the Text Selection module it caused the module to exit the Show Answers mode - it is fixed now.
6. There was a wrong Total sum in the Hierarchical Lesson Report module , the fix also corrects it for the Lesson Progress module.