Fix y range with "clipPath"

[anotherjoshsmith]

This pull request addresses #256 by setting "clipPath" for subject lines and mean lines/areas. I decided to rework the organization of elements in the plots, so it will be best to hold off on the merge until someone else confirms these changes haven't interfered with any of our linking or functionality.

@richford @akeshavan @arokem @jyeatman Let me know if you notice any issues!

[richford]

LGTM. @akeshavan, @arokem, or @jyeatman, could one of you give me a +1 since @anotherjoshsmith reorged a bit and wants to make sure that none of the linking or functionality is broken?

[arokem]

This is not supposed to be happening any more, is it?

You can probably reproduce this by using the following query string (with the template data in our source): ?table[prevSort][count]=2&table[prevSort][order]=ascending&table[prevSort][key]=&table[sort][count]=2&table[sort][order]=ascending&table[sort][key]=MultipleSclerosis&plots[errorType]=std&plots[zoom][rd][scale]=1.9507109230552937&plots[zoom][rd][translate][0]=-33.2050655893036&plots[zoom][rd][translate][1]=-172.63870197496425&plots[zoom][md][scale]=2.1346506760799477&plots[zoom][md][translate][0]=-43.4757823780006&plots[zoom][md][translate][1]=-108.86851606866173&plots[zoom][fa][scale]=1&plots[zoom][fa][translate][0]=0&plots[zoom][fa][translate][1]=0&plots[plotKey]=md&plots[checkboxes][left-corticospinal]=true&plots[checkboxes][callosum-forceps-major]=true&plots[checkboxes][left-ilf]=true&plots[checkboxes][left-arcuate]=true&plots[lineOpacity]=0

[anotherjoshsmith]

@arokem Good catch! Looks like the clipping for all plots toggles on and off with Right Thalamic Radiation. Probably shouldn't be too tough to fix. I'll take another look.