jquery-tabby is never used

If used, .tabby() should be called on some jquery expression,
but 'tabby' substring is never to be found in the code.

Maybe it was used in past, but now CodeMirror takes care of Tab fine.
Merge pull request #22 from amber-smalltalk/tabby-out

jquery-tabby is never used
requirejs as dev dependency, using ^ notation
using grunt amdconfig to produce config.js
helios getting right requirejs path

... from devDependencies of itself or enclosing amber,
every time from config.js with help or requirejs.amd.json.
Release version 0.1.2.
hack to find requirejs in old environment as well
jQuery used in nonminified version

now that deploy minifies it anyway,
nonminified during devel may ease debugging
'grunt devel' aliases 'grunt amdconfig'

to be able to routinely run 'grunt devel'
to refresh codfiguration in project as well as in Amber
Release 0.1.3.
Recompile 0.13 way.
remove uses of low-level (non-st) deprecations
helios: not exporting helios/set in .amd.json
bump amber dep as now compiled in 0.13 way
fix 5b8f465 for standalone helios development
separate codemirrors in amber and helios:

 - as they use old version (3.x), use name codemirror3;
 - they both have their own codemirror3.amd.json;
 - they both load pieces of CM locally, no reuse;
 - legacy IDE not loaded into Helios window - to promote
   CodeMirror upgrade and preventing clashes.
remove old unused file
amber_lib/showdown -> helios/showdown
remove uses of Smalltalk-level deprecations
Release version 0.2.0.