Move all file specific globals to anonymous namespace

libdevcore/CommonIO.cpp

@@ -35,6 +35,9 @@
 using namespace std;
 using namespace dev;
 
+namespace
+{
+
 template <typename _T>
 inline _T contentsGeneric(std::string const& _file)
 {
@@ -56,6 +59,8 @@ inline _T contentsGeneric(std::string const& _file)
 	return ret;
 }
 
+}
+
 string dev::contentsString(string const& _file)
 {
 	return contentsGeneric<string>(_file);