Merge pull request #165 from sunyc/master

More changes to 7.4
Merge pull request #166 from sunyc/master

Fix a crash on early restore_object() call.
Merge pull request #167 from sunyc/master

More Changes for alpha7.4
Merge pull request #170 from sunyc/master

Compile fix for freebsd 9.2
Merge pull request #171 from sunyc/master

Change log for fluffos-alpha7.5
Add one more change to 7.4 release log.
Bump version number to alpha8