Updated the axis option defaults and docs for tickColor, tickFont,
tickWidth, and tickHeight. Also re-organized the API docs to match the
master list, and revised many areas for clarity.

Conflicts:
	jquery.flot.js
	jquery.flot.threshold.js

We can inline the dependencies automatically as part of the build
process.

Add table of contents

The reference document is quite large; a table of contents would help readers navigate and find topics. (TOC was generated via [DocToc](http://doctoc.herokuapp.com/))

It's a little confusing, JSHint complains, and it doesn't make a big
difference anyway.

Updated threshold plugin to work with 'above' operator. Resolves #1059.

We trust that jquery.flot.time.js checks for timezoneJS's existence
before using it.

Lots of people ask about implementing tooltips; hopefully enabling it by
default will help them find it more easily.

These changes were used to test the axis innermost property fix, and
should not have been committed.

An axis is innermost when it's first among those not just in its
direction, but also on its side, i.e. left/right, of the plot. So the
inArray check should be against the samePosition list, not all.
Resolves #1056.

It doesn't make sense to calculate the innermost property only when no
tickLength has been provided; the two have little to do with each other.