create demo files for hosting on gh-pages

- `npm install grunt-include-replace --save-dev`
- replace SSIs with HTML content (static site generation)
- store static html files in demo/ folder
fix demo pages for gh-pages preview

- restructure demo directory
- fix replacement of SSIs with generated content
- change grunt plugin for doing replacement on files
- regenerated static site
fix links to mam script in demo pages
remove MAM script from index page
remove angular from index page
fix link to MAM script