Closing tags fix for #228

Fix for #228.

- Rewrite php_closing_tag fixer to use tokens
- Fix closing tags in code with short open tag as well, works only if short_open_tag is enabled
- Extend utests for php_closing_tag fixer
- Add Tokens::findGivenKind method to find given tokens occurrence
- Try to enabled short_open_tag in php.ini
PHP itself does not.

If short_open_tags is enabled then fixer fix code inside short open tag as well.
If not there are no difference in fixer between new and current versions.

Some server env. read this file to set php flag, eg apache or ideaWebServer