update

doc/Coding_style

@@ -1,6 +1,6 @@
-Use hard tab for indentation. (size 4)
+Use 4 space indent
 Spaces between ","
-ex:  1, 2, 3, 4
+ex:  1, 2, a, 4
 
 if/else-statements:
 An else clause is joined to any preceding close curly brace
@@ -73,10 +73,6 @@ switch (...) {
        break;
 }
 
-goto-statement:
-DONT USE IT!
-
-
 Include guards:
 For files with namespace:
 #ifndef NAMESPACE_FILENAME_HH
@@ -115,22 +111,16 @@ void functionWithAName(...) {
     ...;
 }
 
+Use Javadoc style for function description (see www.doxygen.org)
 Function comments:
-// This do that and that
-// Returns this on success else
-// this on failure.
-// TODO: if there is something to do.
+/**
+ This do that and that
+ @return this on success else this on failure.
+ TODO: if there is something to do.
+*/
 void functionDoes(...) {
 
 }
-Comments:
-Use // on few line comments.
-Use 
-/* 
-...  
-...
-*/
-when there are a lot to comment
 
 Class:
 Order: public, protected and then private