No need to track positions now that tokens/trivia contain them.
No need to track positions now that tokens/trivia contain them.

This also helps for perf a bit as finding the fullWidth of a node can be
expensive the first time is it called.

Conflicts:
	src/compiler/document.ts

fdecampredon/jsx-typescript-old-version,fdecampredon/jsx-typescript-old-version,fdecampredon/jsx-typescript-old-version