Changes to the widget, first step on the way to a synchronized subscribe

Signed-off-by: Dave <dave.dovrat@gmail.com>
16.2.2013

1. Changed some file names
2. Disabled Drag & Drop, never understood what it did in the first place
3. Gui: the two topic edits are now operational.

Todo:
1. plug AddTopic to some functionality


Signed-off-by: Dave <dave.dovrat@gmail.com>
Almost works:

I should probably read the fine print in unused methods, it doesn't throw any exceptions, it just behaves badly.

Signed-off-by: Dave <dave.dovrat@gmail.com>
Synchronized Subscribe, works only with MatPlot for some reason, and not very well.

Next step: create a more stable plot

Signed-off-by: Dave <dave.dovrat@gmail.com>