CppTools: improved languages support in ProjectPart

Please, read blueprint here:
http://qt-project.org/wiki/Blueprint-for-language-specs-system

Removed feature from QbsProjectManager: it not longer splits project on
separate C and C++ parts, because Qt version used only by clang parser
(not native) and can be ignored for pure C and Objective-C without C++.

Change-Id: I1c561f7f9f915cc6cb8579d19db74e8352f54c1e
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/cpptools/cpptools.pro

@@ -48,7 +48,8 @@ HEADERS += completionsettingspage.h \
     TypeHierarchyBuilder.h \
     cppindexingsupport.h \
     builtinindexingsupport.h \
-    cpppointerdeclarationformatter.h
+    cpppointerdeclarationformatter.h \
+    cppprojectfile.h
 
 SOURCES += completionsettingspage.cpp \
     cppclassesfilter.cpp \
@@ -90,7 +91,8 @@ SOURCES += completionsettingspage.cpp \
     TypeHierarchyBuilder.cpp \
     cppindexingsupport.cpp \
     builtinindexingsupport.cpp \
-    cpppointerdeclarationformatter.cpp
+    cpppointerdeclarationformatter.cpp \
+    cppprojectfile.cpp
 
 FORMS += completionsettingspage.ui \
     cppfilesettingspage.ui \