chore(snowhouse): stop using snowhouse as a git submodule.
chore(snowhouse): snowhouse is now bundled as a regular sub directory
fix(general): making valgrind happy

Valgrind complains about memory leaks if we use deque. Changing to
list and everything seems fine. Using operator* on unique_ptr for
getting a reference to the underlying type instead of going via get()
since bandit built with VS could crash otherwise.
chore(documentation): Updating installation instructions

Since snowhouse is bundled, we don't need git submodule anymore.