Recent render check was too strict

Triggers false error warnings.
Can now drop top of infinite stack on itself

Since it is really a copy.
Tools selected properly despite scrolling now

And drops on something under self as well.
Updated robot doc page
More documentation updates

Including page stubs to be written.
Renamed 'proper fraction' to 'mixed number'

More standard name for this concept.
Added table of contents to documentation page

Will fold it into toontalk.js and toontalk.css if continue to be happy
with it.
Added scientific notation for numbers

And improved the shrinking digits in general so should always be small
enough to think it is shrinking forever. Fixes #91.
Display bug in negative scientific notation fixed
Fixed display bug in decimal numbers

Introduced today.
Improved the display a very large integers

Also renamed the 'Decimal' button to 'Decimal number' to match the other
buttons.
Updated numbers documentation
More improvements to number display

Including computing the correct number of digits to display when shrunk.

Code cleaned up and renamings for clarity.
Scientific notation uses smaller font if necessary

If it doesn't fit.

Also no longer displays the decimal point if significand is an integer.
Improved scientific notation display

When there is very little space.
Fixed a drop bug

Caused by change to enable drop of infinite stack on itself 4 days ago.
Widgets removed from scales dimensions restored

If they were added by a user 'event'.
Updated documentation

And added links to manual from index pages.
Updated compiled version

And added scale.js that had been forgotten.
Merge pull request #161 from ToonTalk/master

Updating gh-pages to master