Merge pull request #112 from sunyc/master

Incorporate libevent to driver, and get rid of addr server
Merge pull request #113 from sunyc/master

Prepare for alpha6 release
Merge pull request #114 from sunyc/master

Prepare for alpha6
Merge pull request #115 from sunyc/master

More fixes for alpha6
Merge pull request #116 from sunyc/master

Fix memory corruption problem in async dns.
Merge pull request #117 from sunyc/master

Fix memory corruption problem in other part of event system.
Merge pull request #118 from sunyc/master

Fix typo in socket_status()
Merge pull request #119 from sunyc/master

Remove some obsolete parts
Merge pull request #120 from sunyc/master

some additional CL to include in alpha6
Merge pull request #121 from sunyc/master

Final changes to include in alpha6.
Merge pull request #122 from sunyc/master

Additional CL for fluffos-3.0-alpha6.1
Merge pull request #127 from sunyc/master

Changes for alpha6.2
Merge pull request #128 from sunyc/master

 3.0-alpha6.2
Merge pull request #129 from sunyc/master

Release fluffos-3.0-alpha6.3
Update changelog.
Merge tag 'fluffos-3.0-alpha6.3'

FluffOS 3.0-alpha6.3
EFUN: present(): fix match bug for object with id that ends with digits.