removed 2.2.1-example
Removing bin/ which should not be in Git
src-gen/ & xtend-gen/ better not in SCM at all - Eclipse creates them as needed (and may clear it completey; depending on your Preferences). Also some changes in .gitignore
Ignore *~ temporary files (as e.g. created by gedit)
The (only once) gen. src/ DOES belong into SCM, of course.. ;-)
Merge pull request #2 from vorburger/master

Reduces examples down to just xtext 2.3.0 (the current version) and removes the generated source.  Kind of makes the starting point for the example a little further away from the File -> New -> XText 2.3.0 eclipse project, but few files will make the example more understandable.  We are trying to create the simplest example of an xtext build with maven after all.