fix error handling in signaled commands, error gets info about different scoup instead of true error

more detaild error  print including python trace when more complex unknown error

reinplement drillcncjob

fix camlib problem with all  drills("all"  was already there) but it crashes on tools without points, when  no tools "all" is as default

add timeout to all helps  if  command is  signaled

FlatCAMApp.py

@@ -1,4 +1,4 @@
-import sys
+import sys, traceback
 import urllib
 import getopt
 import random
@@ -695,6 +695,30 @@ class App(QtCore.QObject):
         else:
             raise unknownException
 
+    def display_tcl_error(self, error, error_info=None):
+        """
+        escape bracket [ with \  otherwise there is error
+        "ERROR: missing close-bracket" instead of real error
+        :param error: it may be text  or exception
+        :return: None
+        """
+
+        if isinstance(error, Exception):
+            exc_type, exc_value, exc_traceback = error_info
+            trc=traceback.format_list(traceback.extract_tb(exc_traceback))
+            trc_formated=[]
+            for a in reversed(trc):
+                trc_formated.append(a.replace("    ", " > ").replace("\n",""))
+            text="%s\nPython traceback: %s\n%s" % (exc_value,
+                             exc_type,
+                             "\n".join(trc_formated))
+        else:
+            text=error
+
+        text = text.replace('[', '\\[').replace('"','\\"')
+
+        self.tcl.eval('return -code error "%s"' % text)
+
     def raise_tcl_error(self, text):
         """
         this method  pass exception from python into TCL as error, so we get stacktrace and reason
@@ -702,7 +726,7 @@ class App(QtCore.QObject):
         :return: raise exception
         """
 
-        self.tcl.eval('return -code error "%s"' % text)
+        self.display_tcl_error(text)
         raise self.TclErrorException(text)
 
     def exec_command(self, text):