Adding basic mark drawing support.
They all show as the same color right now, a future commit will implement
better color picking across the app.
There's no mark search yet, either.
Adding simple color palette code.
This will be extended with prettier colors and used by the heatmap/etc.
Hiding mark events from the UI.
Fixing the shim and removing deprecated CSS styles.
Move the goog.base replacer to the shim so it's outside of "use strict".
Fixing some issues with the shim.
Fixing various node.js issues.
Fixing some compiler warnings generated by instrumentType.
Merge pull request #185 from google/mark

Adding basic mark support in the UI.