ContentAfterOpen incorrect arguments to addError

Content on the opening line of the function doc after the opening '/**' causes phpcs to crash. addError function was incorrectly called with only 2 arguments. It was missing the first argument.
added tests for function comment open
Merge pull request #95 from clawsonm/patch-1

ContentAfterOpen incorrect arguments to addError
Make error message better.

Refs #95
Throw warnings instead of errors for problems in api docblocks.
Merge pull request #98 from ADmad/func-comment-sniff

Throw warnings instead of errors for problems in api docblocks.
Change docblock indentation errors to warnings.
Merge pull request #99 from cakephp/docblock-indent

Change docblock indentation errors to warnings.
Bump version number and update changelog.
Add closure declaration spacing sniff
Fix since version docblock
Fix CS errors
Merge pull request #100 from bcrowe/closures

Add closure declaration spacing sniff
Correcting headers in readme.
Make project layout more typical.

* Add phpunit as a dev dependency.
* Move phpunit.xml
* Update travis build scripts.
Make failing tests easier to understand.

It is nice having the sniff that caused the failure.
Fix reference variables in arrays triggering errors.
Add phpunit.xml back in.
Merge pull request #104 from cakephp/reference-operator

Reference operator fixes
Bump version and update changelog.