Add input fields for character attributes.
Add knockout.js.
Include knockout.js.
Add observable properties for all char attributes.
Bind input fields to observable properties.
Make some space for attribute bonus.
Merge branch 'basic-forms' into knockoutjs

Use updated CSS and structure from basic-forms branch.
Wrap JS with jQuery.
Adjust indentation.
Revert commits.

This reverts the following commits:
* "Adjust indentation."
  33a2882fcece469704af75a7baae8545fb4d589f
* "Wrap JS with jQuery."
  418f24569aa4be18b0956943fccd72baf9d28e2e
Add stat bonus computed obsvable for Strength.
Display stat bonus for Strength.
Add test to check whether a variable is a number.
Add function to determine stat bonus from value.
Display computed stat bonus.
Add HTML5 input field validation.
Merge branch 'basic-forms' into knockoutjs

Conflicts:
	character_sheet/index.html
Add character attribute knockout.js template.
Add array of groups of character attributes.
Merge branch 'gitignore' into knockoutjs