Merge pull request #4 from t3easy/master

[FEATURE] Add support for page type external URL
[FEATURE] HTML5 history.pushState()
[TASK] WP8 viewport bugfix
[BUGFIX] Fixed double content bug out of gridelements CE
[FEATURE] Add Google Analytics with ConstantsEditor settings
responsive images with picrutefill
[bugfix] span tag at picturefill
[BUGFIX] Fixed paths for javascripts in header
[CLEANUP] Remove not-used home.html config
[TASK] Gitignore PhpStorm project files
[TASK] Add some constants to constants-editor
[TASK] Move TypoScript and TSconfig to Configuration-folder
[TASK] Rename tsconfig to TSconfig
[TASK] Add new default TSconfig
[CHANGE] Change headerComment
[TASK] Add MIT license