QmlJS: Allow for QML modules with version subdirectories.

That means
import Foo 2.1
can resolve to
/path/Foo.2.1 or
/path/Foo.2 or
/path/Foo

Task-number: QTCREATORBUG-4607
Change-Id: Ie1efc5be2ca2ed3ccc130e8a662f94aed11bec1a
Reviewed-on: http://codereview.qt.nokia.com/194
Reviewed-by: Roberto Raggi <roberto.raggi@nokia.com>

src/libs/qmljs/qmljsdocument.cpp

@@ -363,14 +363,14 @@ void Document::extractPragmas(QString *source)
     }
 }
 
-LibraryInfo::LibraryInfo()
-    : _valid(false)
+LibraryInfo::LibraryInfo(Status status)
+    : _status(status)
     , _dumpStatus(NoTypeInfo)
 {
 }
 
 LibraryInfo::LibraryInfo(const QmlDirParser &parser)
-    : _valid(true)
+    : _status(Found)
     , _components(parser.components())
     , _plugins(parser.plugins())
     , _dumpStatus(NoTypeInfo)