Additional Obb functionality

* Rename all functions dealing with OBB files to mention Obb

* Add 'path' and 'list' functionality to OBB commands

* Store hashed filename in loop's lo_crypt_name and keep lo_file_name
  for the real source filename. That way we can recover it later with an
  ioctl call.

Change-Id: I29e468265988bfb931d981532d86d7be7b3adfc8
diff --git a/Volume.cpp b/Volume.cpp
index f43d375..f945b15 100644
--- a/Volume.cpp
+++ b/Volume.cpp
@@ -74,9 +74,9 @@
 const char *Volume::ASECDIR           = "/mnt/asec";
 
 /*
- * Path to where loop devices are mounted
+ * Path to where OBBs are mounted
  */
-const char *Volume::LOOPDIR           = "/mnt/loop";
+const char *Volume::LOOPDIR           = "/mnt/obb";
 
 static const char *stateToStr(int state) {
     if (state == Volume::State_Init)