readme: update title + fix

Author: jcarpent

README.md

@@ -1,4 +1,4 @@
-EigenPy — Efficient Python bindings between Numpy/Eigen
+EigenPy — Versatile and efficient Python bindings between Numpy and Eigen
 ======
 
 <p align="center">
@@ -21,7 +21,7 @@ EigenPy — Efficient Python bindings between Numpy/Eigen
  - full support of SWIG objects
  - full support of runtime declaration of Numpy scalar types
  - extended API to expose std::vector types
- - full support of vectorization instructions between C++ and Python
+ - full support of vectorization between C++ and Python (all the hold objects are properly aligned in memory)
 
 ## Setup