Release 0.4.2

[k82cn]

Is this a BUG REPORT or FEATURE REQUEST?:

/kind feature

Description:

• Update Release notes
• Cherry pick related issues

[k82cn]

@asifdxtreme , would you help to give a list of merged PRs after 0.4.1? We'd better to chery pick them and release 0.4.2 for users :)

[asifdxtreme]

Here is the list of PR's added in master branch after 0.4.1 release

Name	PR ID	TBD
add balanced resource priority	#636
Take init containers into account when getting pod resource request	#638
Support Plugin Arguments	#639
Support Weight for NodeOrder Plugin	#640
Add event when task is scheduled	#642
Return err in Allocate if any error occurs	#643
Fix Typos	#644
Order task by CreationTimestamp first, then by UID	#645
Order queue by CreationTimestamp first, then by UID	#645
Order job by CreationTimestamp first, then by UID	#645
In allocate, skip adding Job if its queue is not found	#647
Preempt lowest priority task first	#649
Return err in functions of session.go if any error occurs	#651
Change run option SchedulePeriod's type to make it clear	#652
Do graceful eviction using default policy	#655
Add hex108 as reviewer	#656
Address helm install error in tutorial.md	#658
Fix sub exception in reclaim and preempt	#660
Fix wrong caculation for deserved in proportion plugin	#666
Change base image to alphine to reduce image size	#671
Do not create PodGroup and Job for task whose scheduler is not kube-batch	#673

[k82cn]

please also include this one: #673 :)