Using the 'const' qualifier allows the compiler to spot some
programming errors and further optimize the code.
Change-Id: I0df6a00ac1830bd64a10b9336b827e113fa772bb
I was reading through the code and noticed many functions not
documented yet, or with incomplete documentation. Change that.
Change-Id: I85a2419604a9fd9ff3c4828a7463e222652f77bf