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.