renamed Mutex to a lock (does not compile)

diff --git a/inc/Mutex.h b/inc/Lock.h
similarity index 100%
rename from inc/Mutex.h
rename to inc/Lock.h

diff --git a/src/locks/Mutex.cpp b/src/locks/Lock.cpp
similarity index 100%
rename from src/locks/Mutex.cpp
rename to src/locks/Lock.cpp