Rearranged project structure to separate generated code.

Format/reformat_files.sh

@@ -21,12 +21,9 @@ for item in $files ; do
     cp $item $item.tmp
 
     clang\-format $item.tmp > $item
+
+    rm $item.tmp
 
-    sed -i -e 's/*_Nonnull/* _Nonnull/g' $item
-    sed -i -e 's/*_Nullable/* _Nullable/g' $item
-    sed -i -e 's/@property(/@property (/g' $item
+    sed -i '' -e 's/*_Nonnull/* _Nonnull/g' -e 's/*_Nullable/* _Nullable/g' -e 's/@property(/@property (/g' $item
 
-    rm $item.tmp
 done
-
-find ../ -type f -name '*-e' -delete