Merge pull request #91 from ly29/master

All nodes use Svget and Svset
Merge pull request #93 from ly29/master

distance update
Update node_Area.py

indentation
Update Index_Viewer_draw.py

unused import
Update node_IDXview.py

redundant checks removed.
is   `key in inputs`, then it will have a `.links`, but it may be `[]` or have content.
fixed objectin bad memory
output
Merge pull request #96 from ly29/master

socket_value_update removed
cache
templates
playing
Create verts_edges_trig.py
Create parametric_spring_with_polygons.py

![fomaing](https://cloud.githubusercontent.com/assets/619340/2779622/e168a490-cafd-11e3-8a08-c9abd60016d8.PNG)
Merge pull request #41 from nortikin/master

sync