Misc. typos

+ some are doxy others are just comment code.  
+ some minor whitespace and grammatical tweaks. 
+ app/SCL/* typos have also been submitted upstream (https://github.com/stepcode/stepcode/pull/366). So it's ok to merge them in to master.

src/Mod/TechDraw/App/DrawViewAnnotation.h

@@ -57,7 +57,7 @@ public:
 
     virtual QRectF getRect() const;
 
-    /** @name methods overide Feature */
+    /** @name methods override Feature */
     //@{
     /// recalculate the Feature
     virtual App::DocumentObjectExecReturn *execute(void);