a force push to remove large apk file in repo and its commit history

[Jinjiang]

/android/playground.apk

Because the file is not source code and the file size is large. It slow down the remote-clone action

[luics]

examples/playground.apk has been removed.

It seems a little risky to rm a big file from .git.
http://stackoverflow.com/questions/2100907/how-to-remove-delete-a-large-file-from-commit-history-in-git-repository

Let's do it next week after qcon.

[Jinjiang]

I have finished all branches just by one command:

git filter-branch -f --tree-filter 'rm -f android/playground.apk' HEAD

and preserved four main branches for handling risk:

0.5.0
0.5.0-rmapk is new
dev
dev-rmapk is new
example
example-rmapk is new
master
master-rmapk is new

You can check them out to confirm and then remove old branches + push new version branches.

Also, it should be notified to every staff to force re-pull new versions to local repo

[Jinjiang]

done