Cleanup (#820)

* Update instructions and readmes
* Cleanup in base files
* Cleanup in core files
* Cleanup in gui files
* Cleanup in dialog files
* Cleanup in tools files
* Cleanup in test files

nw/core/options.py

@@ -125,12 +125,12 @@ class OptionState():
             return False
 
         stateFile = os.path.join(self.theProject.projMeta, nwFiles.OPTS_FILE)
-        theState  = {}
+        theState = {}
 
         if os.path.isfile(stateFile):
             logger.debug("Loading GUI options file")
             try:
-                with open(stateFile, mode="r", encoding="utf8") as inFile:
+                with open(stateFile, mode="r", encoding="utf-8") as inFile:
                     theState = json.load(inFile)
             except Exception:
                 logger.error("Failed to load GUI options file")
@@ -157,7 +157,7 @@ class OptionState():
         logger.debug("Saving GUI options file")
 
         try:
-            with open(stateFile, mode="w+", encoding="utf8") as outFile:
+            with open(stateFile, mode="w+", encoding="utf-8") as outFile:
                 json.dump(self.theState, outFile, indent=2)
         except Exception:
             logger.error("Failed to save GUI options file")