Update README.md

add feature-list
Update README.md
move hook interfaces to new package
Merge branch 'master' of github.com:rainu/jsimpleshell
add test for l18n feature
implements mechanism for message resolving (that can be used for l18n)
Merge branch 'issue-5-l18n' of github.com:rainu/jsimpleshell into issue-5-l18n