Complete the Types section

[scott-wilson]

• Boolean
• Numbers
  • Integers
  • Long Integers
  • Floats
• None
• Casting
• Mutable vs Immutable
• Add section on Strings #10 Strings
• Add section on Lists #11 Lists
• Add section on Tuples #12 Tuples
• Add section on Dictionaries #13 Dictionaries
• Add section on Sets #14 Sets
• Add section on Frozen Sets #15 Frozen Sets