vendor: Add vendored dependencies

We use cargo vendor to generate a .cargo/config file and the vendor
directory. Vendoring allows us to lock our dependencies and to modify
them easily from the top level Cargo.toml.

We vendor all dependencies, including the crates.io ones, which allows
for network isolated builds.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

vendor/git-3e7c44ea7d5fd800/vm-memory/TODO.md

@@ -0,0 +1,3 @@
+### TODO List
+- Abstraction layer to seperate VM memory management from VM memory accessor.
+- Help needed to refine documentation and usage examples.