Improve frontend modal code using ui.bootstrap.
Use more readable names for various arguments.
Use ui-bootstrap tooltips throughout, except in modals generated in JS (this will come later). The aim is to remove the old angular-ui dependency.
Remove dependency on ngRoute and simplify the routing code in the editor view. This turns out to have the nice side-effect of making the exploration editor page load a lot faster :-)
Improve the CSS for the gallery page.
Continue work on the gallery page CSS.
More gallery CSS tweaks. Fix some lint errors.
Prevent labels from wrapping.
Streamline the way reader tests are written. Make some tests faster by not loading all explorations.
Fix doc error.
Fix an error in a custom jinja filter name, which caused the binary search exploration to fail.
Gallery play button to look like a play button.
Merge branch 'master' of https://code.google.com/p/oppia
WIP: Procedurally created World Cities exploration.
Remove the vertical scrollbars from embedded iframes.
Move JS for index file into a separate file.
Move more modals to the angular-ui.bootstrap framework.
Fix typos.
Record creation and last update times for all entities. Explicitly declare certain fields as unindexed to increase speed.
Move more modals and remove some duplicate code.