ellipsoid normal's calculation little improvement.
replace tbn plane to another folder.
Canvas tile layer asyncronous callback added.
Ellipsoid useful functions added.
Normal map creators added.
Sorted by codes.
Normal map async creation.
Merge branch 'master' of https://github.com/Zemledelec/OpenGlobus

Conflicts:
	sandbox/plane/plane.js
	src/og/planetSegment/planetSegment.js
	src/og/utils/normalMapCreatorAsync.js