Add skill_groups block with names of all skills.
Display skill groups and skills.
Change header levels.
Reorder structure for clarity.
Display skill groups as tables.
Create custom mapping for skills.
Add column for skill ranks.
Use data-bind to set valid IDs on fields.
Change ID of skill input fields.

Since skill names aren't unique, add the group name to the skill ID.
Add skill cost computed observable.
Display the skill cost for each skill.
Merge branch 'skills'

Conflicts:
	character_sheet/index.html