nrsc5 path, ID3 tooltips

1. Added argument for absolute path (with final slash) to nrsc5 if needed, defaults to no path. If absolute path to nrsc5 is required, can now invoke with:
`python3 nrsc5-dui.py /usr/local/bin/`
2. Added tooltips to ID3 info (title, artist, album, genre) in case it exceeds display limitations.

nrsc5-dui.py

@@ -65,8 +65,11 @@ class NRSC5_DUI(object):
         else:
             # Linux/Mac/proper posix
             # if nrsc5 and transcoder are not in the system path, set the full path here
-            self.nrsc5Path = "/usr/local/bin/nrsc5"
-
+            arg1 = ""
+            if (len(sys.argv[1:]) > 0):
+                arg1 = sys.argv[1].strip()
+            self.nrsc5Path = arg1+"nrsc5"
+ 
         self.debugLog("OS Determination: Windows = {}".format(self.windowsOS))
 
         self.mapFile        = os.path.join(resDir, "map.png")
@@ -732,9 +735,13 @@ class NRSC5_DUI(object):
                 #ber = [self.streamInfo["BER"][0]*100,self.streamInfo["BER"][1]*100,self.streamInfo["BER"][2]*100,self.streamInfo["BER"][3]*100]
                 ber = [self.streamInfo["BER"][i]*100 for i in range(4)]
                 self.txtTitle.set_text(self.streamInfo["Title"])
+                self.txtTitle.set_tooltip_text(self.streamInfo["Title"])
                 self.txtArtist.set_text(self.streamInfo["Artist"])
+                self.txtArtist.set_tooltip_text(self.streamInfo["Artist"])
                 self.txtAlbum.set_text(self.streamInfo["Album"])
+                self.txtAlbum.set_tooltip_text(self.streamInfo["Album"])
                 self.txtGenre.set_text(self.streamInfo["Genre"])
+                self.txtGenre.set_tooltip_text(self.streamInfo["Genre"])
                 self.lblBitRate.set_label("{:3.1f} kbps".format(self.streamInfo["Bitrate"]))
                 self.lblBitRate2.set_label("{:3.1f} kbps".format(self.streamInfo["Bitrate"]))
                 #self.lblError.set_label("{:2.2f}% BER ".format(self.streamInfo["BER"][1]*100))