Fix bug of get entry
Merge origin/subsevenx2001_cache into blueworrybear_cache
Finish Cache hit rate.
Merge origin/subsevenx2001_cache into blueworrybear_cache
Merge
Add FIFO policy
Add FIFO policy
ignore
Merge
Add FIFO policy
Merge origin/dafzheng_cache into blueworrybear_cache

Conflicts:
	src/cache_simulator/PolicyFIFO.java
Bug fix
Bug fix
Add FIFO policy
Fix central cache bug
Merge origin/master

Conflicts:
	.gitignore