Use continue not break when drawing motifs.

If we break as soon as we hit a problem we will not see all the motifs. We want
to use continue instead.
jslint fixes.
Fix bug in drawing boxes.

Sometimes we are drawing motifs but we don't draw all because we stop too
early. Basically, if one nt was missing in we would stop drawing the motifs
because we didn't have a bounding for that motif. This would then prevent all
future motifs from being boxed. We now log this problem and give it a default
bounding box. This approach can be cleaned up.
Attempt to draw a box no matter what.

No we will always attempt to draw a box for all motifs. If we are missing nts
then these ids are stored in missing-nts attribute.
Change wording.

The unlikely bounding box case should only occur when we can't find any nts.
Change wording to indicate this.
Update libs