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/Points/App/PointsFeature.h

@@ -58,7 +58,7 @@ public:
     Feature(void);
     virtual ~Feature(void);
 
-    /** @name methods overide Feature */
+    /** @name methods override Feature */
     //@{
     void Restore(Base::XMLReader &reader);
     void RestoreDocFile(Base::Reader &reader);

src/Mod/Points/App/Structured.h

@@ -46,7 +46,7 @@ public:
     App::PropertyInteger Width; /**< The width of the structured cloud. */
     App::PropertyInteger Height; /**< The height of the structured cloud. */
 
-    /** @name methods overide Feature */
+    /** @name methods override Feature */
     //@{
     /// recalculate the Feature
     virtual App::DocumentObjectExecReturn *execute(void);