adds contacts page
modify contacts page
modify contacts page
Revert "modify contacts page"

This reverts commit ead56936dcaf2651272ce8403cffd96ee0715219.

bad comment for last commit
modified file static_pages_spec.rb
Contacts page modified
 starting chapter 5.1.2
fixed error with gem 'sprockets', '~> 2.8' dependency chapter 5.1.2
started 5.4 chapter Users controller generated
Finish layout and routes
git rm exCh4_3.rb