Merge pull request #21 from hlindberg/master

Update arm-2.iteration to 0.2.0
Merge pull request #22 from hlindberg/master

Fix links and header levels arm-2
Merge pull request #23 from hlindberg/master

Update Readme Index.
Correct one example (missing an assignment).
Improve language in "Passing Lambdas in Calls"
Revise arm-2.iteration wrt. 'discussion', and 'uncompleted call'

Also fix typos, remove some duplicated text.
Update arm-2.iteration metadata and index.