Import libHiJack (with problem)

Multiple errors found in HiJackMgr.mm after importing the library and
header files related:
(1) 1 casting issue;
(2) 4 AudioSessionInitialize() issue;
(3) 7 ARC issue.
This is a branch to fix these problems. Unable to build yet.
Successfully imported libHiJack

Problems solved. Build succeed.
(1) Should contain AudioToolbox.framework rather than
AudioUnit.framework.
(2) Delete autoreleasepool related code.
(3) Use __bridge for casting.
Merge branch 'libHiJack-import-problem-solving-branch'