Lockable renamed to Lock (#219)

Also changed usage from unique_ptr to class value.

TactilityCore/Source/Lock.cpp

@@ -0,0 +1,13 @@
+#include "Tactility/Lock.h"
+
+namespace tt {
+
+std::unique_ptr<ScopedLock> Lock::scoped() const {
+    return std::make_unique<ScopedLock>(*this);
+}
+
+ScopedLock Lock::asScopedLock() const {
+    return ScopedLock(*this);
+}
+
+}