Minor rename cleanup.
Environment refactoring.
Fix indentation.
Cleanup some Environment deprecations.
Fix possible NPEs.
Move Env classes to new package.
Some cleanup of constants.
GoCompiler refactoring to use project field.
Removign Env deprecated uses.
More refactoring out of deprecated env code.
Removed unnecessary PreferenceInitializer.
Remove some Environment deprecated functions.
Removed GoEnvironmentPrefs deprecations.
Refactored out some uses of GoWorkspace.