Merge pull request #1 from amber-smalltalk/master

Update from original
added additional jQuery  constructor

http://api.jquery.com/jquery/#jQuery1

It is now possible to add a specified context as parameter to the jQuery
constructor.
More class comments in Helios-Announcements
added additional jQuery constructor

http://api.jquery.com/jquery/#jQuery1

It is now possible to add a specified context as parameter to the jQuery
constructor.
bower --save, cd to project dir
Update README.md
Merge pull request #866 from HeSe/master

jQuery constructors extended
Update CHANGELOG
Update CHANGELOG
Merge branch 'master' of github.com:amber-smalltalk/amber
Release version 0.12.3
Working on 0.13.0