added a minimal changelog

Added a dummy changelog for v0.1.0 so we can keep track of future
changes of this crate.

Fixes: #86

Signed-off-by: Andreea Florescu <fandree@amazon.com>

Author: andreeaflorescu

CHANGELOG.md

@@ -0,0 +1,6 @@
+[v0.1.0]
+
+# Added
+
+- Added traits for working with VM memory.
+- Added a mmap based implemention for the Guest Memory.