Trim the pictures so that they fill up the screen

Remove margins so that we don't get an unsightly border around the screen
Check in support for submarkers

This allows us to identify the points where the picture will change, in
addition to the levels.

This version of the result template is also scaled correctly and displays the
correct bar on the side

Checking in this working copy before I start mucking around with the popup
Add a button that pops up the game rules

The goal was to have the rules popup when the screen was launched, but that
doesn't appear to work in the phone webviews using jquery mobile. I can try
a different framework (ionic), but let's finish everything else end to end first.
Last few UI fixes

- Remove the alerts
- Remove the code to check whether the popup has been displayed earlier and
  popup on start since it doesn't work anyway
- Fix some typos in the text and change the text titles to fit better
Merge pull request #20 from shankari/gamification

Bunch of cosmetic tweaks to the gamification UI