Add release.py

[XueyanZhang]

release.py runs from root folder to:

1. detect and increment current tag number (version)
2. build binary 'peruses_deploy.jar'
3. create a release with new tag number and new binary package. (When releasing, a test editor will pop up for release title and description. Use a blank line to separate them)

[XueyanZhang]

Update:

1. optimised tag version calculation
2. stops automatically if bazel fails to build

[chengniansun]

@XueyanZhang

I left a TODO note in the script. Not urgent. You can take a look next week.