Moving items from thrust/common package

THRUST_VERSION was only used in spawn package, moved it there.
ApplicationName moved to base package.
thrustVersion const moved
Merge remote-tracking branch 'upstream/master' into origin/go-gettable

Conflicts:
	common/versions.go
	doc/common/README.md
Merge pull request #20 from tehbilly/go-gettable

Go gettable