Enabled ESI config.
Using caching for index & impressum pages.
Fixing up path to modernizr
Enabled running assets on different domain.
Fixing up paths to static files.
Refactoring default static file paths into stylesheet & javascript
Added .gitkeep file for web/static/ css & js folders (compiled versions go there)
Ignoring content of web/static/ css & js folders (compiled versions go there)