853 - Downgrade Saucelabs IE version to 9

Close #853.
Downgrading platform to support IE9
846 - Removing unneeded plot arg in animator

Also typing return of animate to D3.Selection

Close #846.
Re-run build (comments removed).

Develop version of built files won't have comments.
Merge pull request #855 from palantir/853-IE9

853 - Downgrade Saucelabs IE version to 9
Fix clip-path with base element on the same page.
Add in HorizontalLegend.

Lists entries side-by-side in the available width, after which the
entries wrap onto the next row. If an entry is too wide it is
truncated. If there are too many entries some rows will not be shown.

Close #755.
Merge pull request #865 from palantir/784-clippath-2

784 - Fix clip-path with base element on the same page
Release version 0.25.1
Merge pull request #874 from palantir/release-0.25.1

Release 0.25.1
Remove comments on develop.
Streamline and clarify code.
846 - Removing unneeded plot arg in animator

Also typing return of animate to D3.Selection

Close #846.
Merge branch '846-removeAnimatorPlotArg' of github.com:palantir/plottable into 846-removeAnimatorPlotArg

Conflicts:
	plottable.js
Merge pull request #857 from palantir/846-removeAnimatorPlotArg

846 - Removing unneeded plot arg in animator
844 - Appending area plot before line during _setup

Close #844.
Refactors; add <title> for better readability.
Removing useless setup definition
Factor size calculations out into a separate call.
Missing semicolon );