Adds import support for fitting window copy. Resolves #91

This requires us to pass an active fit to use as a base for the modules, as the format does not include ship information. Features:
* If active fit has modules, makes a new fit using same ship
* Does basic dummy checking. As the format doesn't include ship info, it will probably be common for someone to accidentally try to import a Legion fit to a Rifter by mistake. Import logic checks module legality for fit and, if fails, silently halts import without saving.

gui/mainFrame.py

@@ -473,12 +473,13 @@ class MainFrame(wx.Frame):
     def importFromClipboard(self, event):
         sFit = service.Fit.getInstance()
         try:
-            fits = sFit.importFitFromBuffer(fromClipboard())
+            fits = sFit.importFitFromBuffer(fromClipboard(), self.getActiveFit())
             IDs = sFit.saveImportedFits(fits)
             self._openAfterImport(len(fits), IDs)
         except:
             pass
 
+
     def exportToClipboard(self, event):
         CopySelectDict = {CopySelectDialog.copyFormatEft: self.clipboardEft,
                           CopySelectDialog.copyFormatEftImps: self.clipboardEftImps,