data: stop indexing of files with fatal errors and store them as incomplete (issue 358)

* avoid AST traversial for CXX translation units with fatal errors
* save all files within those translation units as incomplete
* show number of complete files in finished indexing dialog and overview stats
* display incomplete files hatched in graph view
* display incomplete file titles hatched in code view
* mention file incompleteness in tooltips
* removed derived Indexer classes and set ParserType via template parameter instead
* moved getSourceFileFromCDB from IndexerCxxCdb to IndexerCommandCxxCdb

bug id = 358

src/lib_cxx/data/parser/cxx/CxxAstVisitor.cpp

@@ -13,6 +13,7 @@
 #include "data/parser/cxx/CxxAstVisitorComponentImplicitCode.h"
 #include "data/parser/cxx/CxxAstVisitorComponentIndexer.h"
 #include "data/parser/cxx/utilityCxxAstVisitor.h"
+#include "data/parser/ParserClient.h"
 
 #include "data/parser/ParseLocation.h"
 
@@ -282,6 +283,11 @@ bool CxxAstVisitor::TraverseTemplateTemplateParmDecl(clang::TemplateTemplateParm
 	return true;
 }
 
+bool CxxAstVisitor::VisitTranslationUnitDecl(clang::TranslationUnitDecl *d)
+{
+	return !m_client->hasFatalErrors();
+}
+
 bool CxxAstVisitor::TraverseNestedNameSpecifierLoc(clang::NestedNameSpecifierLoc loc)
 {
 	bool ret = true;