Fixed destroy command

Now incorporates whales, drones and all
Plus a small fix in the settings (set new mission text to version 2.1)
Built release version

Why not if we already ship built debug version with the source?
Revert "Built release version"

This reverts commit d3c5ae869a3163fda1a027bc7c2934f22e1d556b.
Built release version (without extra files)

Why not if we already ship built debug version with the source?
(In previous commit accidently attached an unrelated file)
Many small fixes to new script commands

Decided to fix other stuff while I'm at it:
* Fixed "set_side_value" and "set_special"
* Added custom menus for set_side_value and set_special
* Fixed limits and editing form for elite ability bits
* Improved "set_ship_text" and "start/end_getting_keypresses_from"
statement texts
* In many cases with these commands added dropdown for names (to select
object name from a list of objects created somewhere in the script)
* Added additional hotkeys to checklist (consoles and ability bits)
forms: tilde for all and numbers for exact items
* Allowed up to 29 skyboxes and manual input of any number
Fix to assembly number

Forgot to increment ...
Merge pull request #1 from IstrebiteI/fix_destroy_all

Fix destroy command (whales, drones & all)