restructuring classic snippets dir to conform to new parenting specs

snippets/c++-mode/.yas-parents

@@ -0,0 +1 @@
+cc-mode

snippets/c++-mode/beginend

@@ -0,0 +1,3 @@
+#name : v.begin(), v.end()
+# --
+${1:v}.begin(), $1.end

snippets/c++-mode/class

@@ -0,0 +1,8 @@
+#name : class ... { ... }
+# --
+class ${1:Name}
+{
+public:
+    ${1:$(yas/substr text "[^: ]*")}($2);
+    virtual ~${1:$(yas/substr text "[^: ]*")}();
+};

snippets/c++-mode/ns

@@ -0,0 +1,3 @@
+#name : namespace ...
+# --
+namespace 

snippets/c++-mode/template

@@ -0,0 +1,3 @@
+#name : template <typename ...>
+# --
+template <typename ${T}>

snippets/c++-mode/using

@@ -0,0 +1,4 @@
+#name : using namespace ... 
+# --
+using namespace ${std};
+$0