Update README.
Removed A0Session and related clasess.
Removed JWT parsing.

It will be available in https://github.com/auth0/JWTDecode.iOS.
Update README.

[skip ci]
Removing xctool as a build tool.
Using xcodebuildi directly with xcpretty.
Merge pull request #29 from auth0/chore-remove-refresh

Remove refresh token classes.
Update README.

[skip ci]
Update version to 1.0.0-rc2
Update README

[skip ci]
Merge remote-tracking branch 'origin/master' into example-work

Conflicts:
	README.md