EzTemplate updates

[durack1]

@danlipsa @doutriaux1 I was dropping this placeholder as a reminder that the EzTemplate defaults need updating see CDAT/vcs#155.

It would also be a good time to refine the terminology used:

In [7]: import EzTemplate
In [8]: M = EzTemplate.Multi()
In [9]: M?
Type:           Multi
String form:   
----------Template (P) member (attribute) listings ----------
           rows = 3
           columns = 2
           template = def <...>
           vertical = 0.035
           member = legend
           direction = horizontal
           stretch = 0.8
           thickness = 0.2
           fat = 0.05
File:           ~/anaconda2/envs/cdatcmornclnco/lib/python2.7/site-packages/vcsaddons/Multi.py
Docstring:     
Multi Plotter Object
Allows easy creation of templates for multiple plots
Init docstring:
Initialize the Object, need to pass number of row and columns (rows and columns)
default: 2 cols, 3 rows

The terms fat, thickness, stretch seem vague to me as discussed with @doutriaux1, it may be better to use more familiar terms like height, width, horizontal etc