Added validation on exzbike model to make sure that total for distance
and calories in both exercise and cool down match total distance traveled
and calories burnt.

 On branch master
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 Changes to be committed:
	modified:   app/models/exzbike.rb
	modified:   app/views/exzbikes/_form.html.erb
	modified:   db/schema.rb
Fixed up exzweights form to show proper initial values.

 On branch master
 Your branch is up-to-date with 'origin/master'.

 Changes to be committed:
	modified:   app/views/exzweights/_form.html.erb