Code quality: some renaming here and there

examples/simple.cpp

@@ -0,0 +1,17 @@
+#include "isaac/array.h"
+
+namespace sc = isaac;
+
+int main()
+{
+
+    std::vector<float> data(70);
+    for(unsigned int i = 0 ; i < data.size(); ++i)
+      data[i] = i;
+    sc::array A = sc::array(10, 7, data);
+    std::cout << A << std::endl;
+    std::cout << sc::diag(A, 1) << std::endl;
+    std::cout << sc::diag(A, -1) << std::endl;
+    std::cout << sc::diag(A, -7) << std::endl;
+    std::cout << sc::row(A, 3) << std::endl;
+}