Fixing package of a couple of tests.
acquireWorkspace was sometimes failing in CI; trying to make it more reliable.
Update docs for running demo behind proxy
Fix typo in README.md
Clarified what I meant by this
Merge pull request #7 from szpak/patch-1

Fix typo in README.md
Merge pull request #6 from scoheb/master

Update docs for running demo behind proxy
Feedback from Michael Neale

Apparently it wasn't obvious where to find this.
Merge branch 'master' of github.com:jenkinsci/workflow-plugin
Linking to demo overview.
Merge branch 'master' of github.com:jenkinsci/workflow-plugin
Making the demo runnable offline
Revert "Update docs for running demo behind proxy"

This reverts commit f052131d7741eee21612959d88c2da4cca6ac0c4.

The previous commit (3bd1f7305d405a21603a973f0e100f39fd96c1f2) makes
the demo runnable offline, so there's no need to describe the use of
proxies
Linking to JUC video.
Allowing StepDescriptor.newInstance to throw checked exceptions for convenience.
instantiate is a generally useful utility method, so making it public and static.
Probably it should really be defined in Stapler or some other lower level.
Clarifying that a descriptor is expected to instantiate the Step type it owns.
Generified instantiate for better type safety.
Make methods final that intend to delegate to another abstract method.
Demo script now lives in demo/config.xml.