PR 572: Add initializer list constructors to Matrix and Array (include unit tests and doc)

- {1,2,3,4,5,...} for fixed-size vectors only
- {{1,2,3},{4,5,6}} for the general cases
- {{1,2,3,4,5,....}} is allowed for both row and column-vector

test/CMakeLists.txt

@@ -287,6 +287,9 @@ ei_add_test(half_float)
 ei_add_test(array_of_string)
 ei_add_test(num_dimensions)
 ei_add_test(stl_iterators)
+if(EIGEN_TEST_CXX11)
+  ei_add_test(initializer_list_construction)
+endif()
 
 add_executable(bug1213 bug1213.cpp bug1213_main.cpp)