V0.2.1 - Grammar & Misc. Changes.

A bunch of smaller improvement:

• Grammar & additional minor changes.
• Added information on Temporary Heroic Points duration (Reset on Rest).
• Moved Level Tiers to it's own full category, keeping just a small description in Outline of the Character.
• Added description to the classes in the character creation step by step pages.
• Explained that one can have as many Mastered Archetypes as they want.
• Fixed Paladin Oath Contract stating damage instead of hearts lost. Also lowered amount to 3 from 4.