minWidth does not work with percent values

[Doug-CaptainAwesome-Richardson]

When entering the minWidth value of a given column, if the value is a percent, the grid will not render.

STEPS TO DUPLICATE

1. Create a grid with columns (be sure minWidth is a property in at least one of them)
2. Set the minWidth property to a percent value (must be a string value, i.e. '10%' and not 10%)
3. Assuming everything else was done correctly, the grid will still not render (to verify this was done right, change the percent value to a number; if the grid renders properly in this instance, you presumably did everything else right).

Below is a link to a plunkr I made to demonstrate this (I basically took the tutorial plunkr from lesson 204 from the tutorial and changed the minWidth to 10% for the first column in app.js)

http://plnkr.co/edit/9kjMpGNtWKTAEbi1bOCe?p=preview

Analyzing the results with firebug, the following message came back in the console.

Error: Cannot parse column minWidth '10%' for column named 'name'

[prx-lmo]

This is an enhancement, not a Bug.