Do not generate mipmaps if render target generateMipmaps is not set.

This also fixes two examples that had generateMipmaps set to false but
requested LinearMipMapLinearFilter which after the changes results in
a WebGL error.

Fixes #6316

CubeCamera.updateCubeMap(): restore the default framebuffer

/ping @dmarcos @borismus @toji @spite

Conflicts:
	examples/js/controls/VRControls.js

feat(size): adds method to return the renderers size

Will use spec-compliant paths when available and fall back to older
paths when it's not.

Add 'TextGeometry' to Object loader

fix deferred renderer with new separate uv/uv2 vertex/fragment params.

Allow the use of TransformControls simultaneously with other controls

Added 'annotate' utility to slice JSON-from-3DS-Max animated model into multiple animations