[New Feature] Proper INI inheritance

[Metadorius]

Description:

The current system for inheritance in Ares is buggy, limited and doesn't comply with INI syntax. The proposed feature should work with any INI-defined types and allow multiple inheritance.

Possible Implementation:

Two possible ways of implementation:

1. Parse Inherits tag when parsing any section (allows inheriting anything from anything without types even knowing inheritance was made) - parser level implementation;
2. Parse Inherits tag on type parse (limited inheritance only on selected types; allows inheritance in scenario rules).

Example INI code:

[TypeA]
A=1

[TypeB]
A=2
B=2

[TypeC] 
Inherits=TypeA,TypeB
C=3
; results in A=2 B=2 C=3

[TypeD]
Inherits=TypeB,TypeA
B=4
D=4
; results in A=1 B=4 D=4

[TAK02]

Maybe add Inherits.Update=boolean ;def=no too?
Basically, if the type inherited from gets any additions/overrides (via map files or multiplayer mode INIs) they're applied to the inheritor too.

Example:

[TypeA]
...
[TypeB]
Inherits=TypeA
Inherits.Update=yes
FlagA=...
[TypeC]
Inherits=TypeA
Inherits.Update=no
FlagA=...

When [TypeA] is given, say, TechLevel=-1 in a map file, that TechLevel is applied to both [TypeA] and [TypeB] (*.Update=yes), but not [TypeC] (*.Update=no).