CURRIKI-6056 : PROJECT: Activate Wysiwyg 2.0 instead of TinyMCE

Code update on SimpleWikiResource, SimpleHTMLResource. Javascript
validations reworked and moved into StyledMacros20 (included validation
for wysiwyg editor content).
CURRIKI-6056 : PROJECT: Activate Wysiwyg 2.0 instead of TinyMCE

Removed comment on setting the contents of wysiwyg editor to content
property of CurrikiCode.TextAssetClass
Merge pull request #3 from flaviusx/master

Javascript validations reworked for SimpleWikiResource and SimpleHTMLResource.
This is part of CURRIKI-6056.
Thank you Flavius
paul