many small fixes and documentation improvements,
this should be alpha5.
diff --git a/doc/snippets/MatrixBase_inverse.cpp b/doc/snippets/MatrixBase_inverse.cpp
new file mode 100644
index 0000000..eb402df
--- /dev/null
+++ b/doc/snippets/MatrixBase_inverse.cpp
@@ -0,0 +1,7 @@
+Matrix2d m = Matrix2d::random();
+cout << "Here is the matrix m:" << endl << m << endl;
+Matrix2d::InverseType m_inv = m.inverse();
+if(m_inv.exists())
+ cout << "m is invertible, and its inverse is:" << endl << m_inv << endl;
+else
+ cout << "m is not invertible." << endl;