Replace uses of parentElement with parentNode

Since in Google Apps parentElement isn't defined.
Advanced settings button reprogrammed

So that it will work in Google Docs.
Introduced a flag to turn off local storage

Since it breaks Google Docs.
Updated Github README file
Added documentation for sensors
Fixed robot conditions display bug

Due to recent changes if the condition was a box its contents were not
displayed.
Added the first cardinality activity
Added a new test file

For working with Google Apps Script
Bird hatching location fixed

When there were more than one top-level backside the bird flew to the
top one.

Also adjusted where the bird ends up.
Adjusts nests position after egg hatch
More than one vacuum can be on a page

Needed for tutorials and manuals.
More than one wand can be on a page
Tools cause scrolling if needed

When holding a tool and reaching the edge of the page the window is
scrolled automatically.
Updated first cardinality activity
Merge pull request #174 from ToonTalk/master

Updating gh-pages to master