Update 5.0

WARNING! This is completely reworked version (5.0) of Hero Editor, it's incompatible with old versions (4.6 and older).

If you're using an old version of Hero Editor and you're happy with it, don't update or make a backup before updating.

What's new:
- Completely new UI, dropdowns were replaced by inventory of equipment items
- Icons included, they are now consistent with equipment (1:1)
- Inventory system included (with Shop and Inventory examples)
- New customization options added (Pauldrons, Vest, Belt, Gloves, Boots)
- QUICK START scene added, it may be very helpful for beginners
- Global script refactoring, now it's much easier to understand the code
- CharacterSetup.cs and CharacterAnimation.cs scripts may be very helpful for beginners
- Global animation refactoring, now our animation system is very simple
- Json serialization is now made by Newtonsoft.Json
- Pro and SpellMasters collections were moved to Basic
- All sprites have Tight mode now, this will greatly reduce build size
- GitHub wiki was extended