added some usage doc for phpstorm in combination with php-cs-fixer, added necessary screenshots, gitignore for .idea-dir

updated readme with new doc

fixed screenshots to be displayed immediately instead of using links

fixed listing index

fixed typo

decreased number of headings in coding standards doc

removed gitignore, adjusted listing in phpstorm doc

updated php-cs-fixer docs with easier brew install command

merged separate branch into this one as they are very much related

slight adjustment

fixed anchor issue