Export .isSeriesLocked() API function

This is a followup to https://github.com/danvk/dygraphs/pull/159,
exposing the .lockedSet_ internal attribute through the API
for use in callbacks, and also with an eye for future extraction
of the mouseover logic into a plugin.

Includes a fix for the auto_test name, it was erroneously replacing
the existing testClosestPointCallbackCss1 test due to a name clash.
Update to Fix Issue 162: Support DOS-style line endings.
IE8/IE7 does not support string iteration using [], this fix uses charAt. Also I added support for \r\n (CRLF), which is more common than \n\r (LFCR). It now supports all four
Fixed an issue with the chart title not being visible in IE8 and before. This does the same thing as the axes labels (sets the zIndex to 10), to ensure it displays on top of the canvas.
Merge branch 'master' of github.com:jhollingsworth/dygraphs
Merge pull request #168 from jhollingsworth/master

Update to Fix Issue 162: Support DOS-style line endings and IE8 Title
findClosestPoint visibility bias fix, as described in this issue;
https://code.google.com/p/dygraphs/issues/detail?id=369
Add third data set to visibility.html.
reverse the lines for the series C of NoisyDataABC to make it less obvious it was a shifted copy of series B.
Merge pull request #170 from shole/master

findClosestPoint visibility bias fix
Merge pull request #171 from kberg/master

Add third data set to visibility.html
Add tests (which currently fail) that ensure that drawPointCallback and drawHighlightPointCallback play nice with axis settings.
testDrawHighlightPointCallback won't pass when the tests change because it requires mouse operations. Set it aside for now.
Added actual drawing to test for visual cue.
Add dygraph-options.js. Add code to compare behavior. Looks like it's only working in very limited cases.
Looking better -- handle the CSV/no label case.
Reparse when series is set for array data.
Fix mis-named method.
Respect options set in the series-axis object (e.g. Y2 : { labelsKMB: true })
Support highlightSeriesOpts, and, standardize on field names.
Remove the old code for attr_.