Fix whitespace

- remove trailing whitespace
- remove duplicate blank lines
- remote blank lines at end of file

Fix licenses

Redone concatenations using "foo %s" % bar

During the code review for the insertion of visualCAmkES into the next branch
I was adviced to change the string concatenations from "foo" + "bar" to "foo %s" % bar.
This commit makes this change across the visualCAmkES code.

JIRA: CAMKES-490

Fixed style, removed unnecessary methods

Created property widgets and associated integration logic

This commit addresss the issue: JIRA CAMKES-477
Property widgets are made for instance and connections
Graph_widget will open the appropriate property widget when a widget is clicked
Property widgets are "dock widgets" in QT terminology

Choose nice blue and green colors for control and hardware instances respectively.

Fixed drawing bug. Needed to change bounding rect to include border.

Attempted to draw borders more cheaply

Border for hardware

Added border around all control instances

Refactored edge drawing. Found some hidden bugs in the process. Attempted to draw edges when widgets overlap,
not ideal but its semi-ok. Essentially draw from centre to centre instead of edge to edge when overlapping.
Also made some documentation changes.

Removed all references to Component Window

Removed unnecessary prints

Preparing for camkes-tools next branch merge