Major changes to Section logic, tests, general cleanup

• Added Section() and tests.
• Removed *SectionAttribute() in credentials, use Section() instead.
• Refactored most tests to be cleaner, leaner, and more effective.
• Removed useEnvironment from factory.New()
• Added SetAlternates()
• Streamlined *Alternates() functions to use their *Alternate() sub functions.
• Added more profile tests.

Re-released due to git amend.