Add .pyc and data dir to gitignore
Support swipe to switch pages

Requirements:

1. include static/default/default.init.js to index.html
2. Page Div (div with "page" data-role) Must have an "id"
2. Page Div (div with "page" data-role) Must have "data-next" or/and
"data-prev" to identify the "next" and "prev" page to swipe