Make labels in required fields visually distinct.

Refs cakephp/cakephp#5113
Merge pull request #171 from cakephp/issue-5113

Make labels in required fields visually distinct.
Correct www_root to wwwRoot.
Merge pull request #172 from cakephp/master-webroot

Correct www_root to wwwRoot.
Added Port to MySQL config array

Added 'port' => '3306', and a comment reminding mamp users to change to
8889
Comments to help MAMP users with DataSources
Comments to help MAMP users
Merge pull request #174 from basementjack/master

Comments to help MAMP users on OSX
Add file and line and more useful debug infos to error output.
Merge pull request #175 from cakephp/master-debug

Add file and line and more useful debug infos to error output.
Add missing use statement.
Merge branch 'master' of https://github.com/cakephp/app