Add main page

* Add Python bytecode to .gitignore.
* Add Bootstrap Social css to style login buttons.
* Add main page.
Add profile set up and dashboard pages

* Add models to store user information.
* Add Jasny Bootstrap CDN links to style html file inputs.
* Users can set up profiles.
* Add BaseHandler to check if profile is set up.
* Add files for static variables, default display picture, models,
alert-related scripts, css, base template, and helper methods.
Add add location page

* Add Google browser API key for Google Maps.
* Add geohash module.
* Add css and base template file for map pages.
* Add JSON encoder for NDB objects.
* Users can add locations.
Add locations page

* Add location delete feature.
* Add sorttable.js library to sort tables.
* Add css to center/vertically center table cell content.
* Add locations page.