Fixes for all of the plugins. Added a script to invoke mypy. (I'm stiiiick of .bat files. They are just broken.)

run_mypy.py

@@ -0,0 +1,31 @@
+#!env python
+import os
+import subprocess
+
+os.putenv("MYPYPATH", r".;.\plugins;..\Uranium_hint\;..\Uranium_hint\stubs\\" )
+
+def findModules(path):
+    result = []
+    for entry in os.scandir(path):
+        if entry.is_dir() and os.path.exists(os.path.join(path, entry.name, "__init__.py")):
+            result.append(entry.name)
+    return result
+
+plugins = findModules("plugins")
+plugins.sort()
+
+mods = ["cura"] + plugins
+
+for mod in mods:
+    print("------------- Checking module {mod}".format(**locals()))
+    result = subprocess.run(["python", r"c:\python35\Scripts\mypy", "-p", mod])
+    if result.returncode != 0:
+        print("""
+Module {mod} failed checking. :(
+""".format(**locals()))
+        break
+else:
+    print("""
+
+Done checking. All is good.
+""")