Script overte - #71

* De-emphasise Overte being just a VR platform
* Don't use var in example scripts

* Convert from markdown to reStructuredText format
* Fix syntax error in example code
* Expand Equip Item section with full working example
* Add "use strict" and remove vars in example code

* console.log in an exported function will not show in logs

…redText

…ict"

* "use strict", etc.
* Also add a way for desktop users to try out the avatar script by pressing "x" on their keyboard.

* Remove section on using Package Model to add scripts; does not work
* Replace image of text editor with code block, including highlighted line

* Encourage use of server entity script in some situations
* Correct steps to add a client entity script, with scripts page icon.
* Example script now wil "use strict", etc.

* Correct steps to attach a Server Entity Script to an Entity
* Example script will now "use strict", etc.

* I don't mean to alarm anyone, but it is now closer to 40 years since the 80s. A slight change to the wording to make this tutorial timeless.

* Loading a script from the UI will load it persistently

* clickDownOnEntity only responds to mouse click events; cannot be used in VR with controllers
* mousePressOnEntity responds to both mouse click and controller trigger events

…rototype function.

Co-authored-by: Julian Groß  <julian.g@posteo.de>

…ipts

minor correction

Co-authored-by: Julian Groß  <julian.g@posteo.de>