Update README and namespaces

README.md

-# cpp_starter
+# simucene
 
-A hello world C++ application using cmake and Eigen
+Physical simulation experiments
 
 ## Dependencies
 
@@ -29,5 +29,5 @@ Tips:
 From the build directory,
 
 ```
-cpp_starter/cpp_starter
+simucene/simucene
 ```

simucene/main.cpp

@@ -2,7 +2,7 @@
 #include "vector.h"
 #include <iostream>
 
-using namespace cpp_starter;
+using namespace simucene;
 
 //--------------------------------------------------------------------------------------------------
 int main(int const, char const**) {

simucene/my_class.cpp

@@ -2,7 +2,7 @@
 
 #include <iostream>
 
-namespace cpp_starter {
+namespace simucene {
 
 //..................................................................................................
 void MyClass::hello() const {

simucene/my_class.h

-#ifndef CPP_STARTER_MY_CLASS_H
-#define CPP_STARTER_MY_CLASS_H
+#ifndef SIMUCENE_MY_CLASS_H
+#define SIMUCENE_MY_CLASS_H
 
 #include <string>
 
-namespace cpp_starter {
+namespace simucene {
 
 //--------------------------------------------------------------------------------------------------
 class MyClass {

simucene/vector.h

-#ifndef CPP_STARTER_VECTOR_H
-#define CPP_STARTER_VECTOR_H
+#ifndef SIMUCENE_VECTOR_H
+#define SIMUCENE_VECTOR_H
 
 #include <Eigen/Core>
 
-namespace cpp_starter {
+namespace simucene {
 
 //--------------------------------------------------------------------------------------------------
 template <typename T>