Textures and queries object with lifetime targets

[elect86]

Texture and queries are two special identifiers which will conserve for their entire life the given/bound target (more here, also this is the same reason why create* require the target as well).

So, here a question rises: shall we promote them to normal classes with a val target?

Pro: less namespace pollution
Vs: we lose inline class benefits

Or we can encode the target into the inline class, which "extends" the base inline class. Such as
GlTexture2D : GlTexture

Pro: we keep the inline benefits (to avoid boxing we can have a method to pass the inline class itself as its "super", ie GlTexture2D::asSuper: GlTexture, whenever you have to call a method requiring that)
Vs: we get some additional identifiers

[Sylvyrfysh]

I would prefer the last approach. It makes more sense, adding safety rather than removing it. I see the negative being mostly a minor maintenance cost