Don't keep texture data in memory unless it's necessary

[in0finite]

When loading textures, specify whether you need them to be kept in memory or not. Usually, they don't need to be in memory, or their data is needed for temporary calculations (flipping the texture).

In case of temporary calculations, when calling Apply(), texture should no longer be kept in memory.

This should greatly reduce amount of memory the application uses.

[in0finite]

Done