BugFix #35: Sources can't be set to a negative value.
Featur Request #31 OutBus undefined behavior with only some inputs high imp.
Featur Request #29: Add file dialogs to Bom and Create subcircuit.
BugFix #30: Circuit not saved if new circuit is created.
BugFix #34: Redraw problems in some components.
Fix minor Translation issue.
Review Translation strings.
Start Translation system.
Create simulide 0.2.8 branch
