Corrected the typos in the chunk_vector_component.hpp file
Corrected typos in documentation from the chunk_vector_component.cpp
Corrected the typos from the vector.hpp and
also added proper indentation.
Added documentation for some remaining API in segmented vector.
Also corrected typos in segmented_vector_iterator.hpp
Corrected typos from in the algorithm.hpp file
Added programmer documentation for segmented vector iterator
Also corrected some typos