Hard coded path inside AstParserHelper.java, causing FileNotFoundException on some installations, removed
1.Resolve some delcarative IDs problems in plugin.xml
 == old org.uqam.* causing problems.
However it's is not possible to refactor NitBuilder and NitNature delcarative IDs because they are hard-coded by Eclipse in the hidden .project files.
Refactoring those IDs would result in broken legacy projects.

2.Refactoring newprojectwizard to wizards in order to add a couple of unrelated wizards
Minor modifications,  subject to revert. Just try to better trace an astonishing number of parsing failures
Cleaning and commenting
Minor modifications,  subject to revert. Just try to better trace an astonishing number of parsing failures
Light changes in StyledLabelProvider :
*outline now support generic classes
*nullable type are prefixed with the zero-crossed/null set unicode character
*a module file without modules clauses has an implicit module statement  like module filename - ".nit"
Adding a configuration wizard, launched at every nit plugin loading.
This wizard checks if a nit installation is set (at least the compiler and the standard lib).
A user should not be able to compile/run a nit program without defining these parameters.