import position info from Milsoft

Bugs need to be fixed:
->Add a mouse over event to gridEdit.html
->Add a scale ruler to gridEdit.html such that we know how long it
really takes.
->fix bug of adding house, battery, etc
->remove unlinked nodes
->optimize the position of triplex_node
ATTENTION:
Since lacking info of zone, use relative pixel position instead of real
geo position.
generate coordinates in backend
position of random house and random waterheater
delete unused js
Optimize adding new child at select node
Dynamic graph size (nodes and links)
fix a bug

When adding node, detect the current graph is fixed or not
Fix a bug

Adding new node when no position info
fix some bugs

1. fix nodes size
2. optimize import data position
3. adding some Mil to JSON files.
Update for default force.charge
Merge branch 'feederLayoutCoordinates'

Conflicts:
	templates/gridEdit.html