Document: Templating and style guide

[capelastegui]

We should have a style guide for developers, explaining common rule templates.

Examples:

• Basic stat block format
• Acronyms
• Text formatting

[capelastegui]

Example: how do we deal with monster melee reach?

• class: melee powers have a fixed reach, e.g. melee 2
• race: trait with +x Melee reach.