Fix build warnings from deprecated Boost headers (they are used internally by Boost). Thanks @wwmayer for the hint.

src/App/Application.h

@@ -24,7 +24,7 @@
 #ifndef APP_APPLICATION_H
 #define APP_APPLICATION_H
 
-#include <boost/signals2.hpp>
+#include <boost_signals2.hpp>
 
 #include <vector>
 #include <deque>

src/App/Document.h

@@ -37,7 +37,7 @@
 #include <stack>
 #include <functional>
 
-#include <boost/signals2.hpp>
+#include <boost_signals2.hpp>
 
 namespace Base {
     class Writer;

src/App/DocumentObject.h

@@ -36,7 +36,7 @@
 
 #include <unordered_map>
 #include <bitset>
-#include <boost/signals2.hpp>
+#include <boost_signals2.hpp>
 
 namespace App
 {

src/App/DocumentObserver.h

@@ -25,7 +25,7 @@
 #define APP_DOCUMENTOBSERVER_H
 
 #include <Base/BaseClass.h>
-#include <boost/signals2.hpp>
+#include <boost_signals2.hpp>
 #include <set>
 #include <memory>
 

src/App/DocumentObserverPython.h

@@ -26,7 +26,7 @@
 
 #include <CXX/Objects.hxx>
 
-#include <boost/signals2.hpp>
+#include <boost_signals2.hpp>
 #include <boost/bind/bind.hpp>
 #include <string>
 

src/App/GroupExtension.h

@@ -24,7 +24,7 @@
 #ifndef APP_GROUPEXTENSION_H
 #define APP_GROUPEXTENSION_H
 
-#include <boost/signals2.hpp>
+#include <boost_signals2.hpp>
 #include "FeaturePython.h"
 #include "DocumentObject.h"
 #include "PropertyLinks.h"

src/App/Link.h

@@ -24,7 +24,7 @@
 #define APP_LINK_H
 
 #include <unordered_set>
-#include <boost/signals2.hpp>
+#include <boost_signals2.hpp>
 #include <boost/preprocessor/facilities/expand.hpp>
 #include <boost/preprocessor/cat.hpp>
 #include <boost/preprocessor/seq/for_each.hpp>

src/App/MergeDocuments.h

@@ -24,7 +24,7 @@
 #ifndef APP_MERGEDOCUMENTS_H
 #define APP_MERGEDOCUMENTS_H
 
-#include <boost/signals2.hpp>
+#include <boost_signals2.hpp>
 #include <Base/Persistence.h>
 
 namespace zipios {

src/App/PreCompiled.h

@@ -80,7 +80,7 @@
 #include <iterator>
 
 // Boost
-#include <boost/signals2.hpp>
+#include <boost_signals2.hpp>
 #include <boost/bind/bind.hpp>
 #include <boost/regex.hpp>
 

src/App/PropertyExpressionEngine.h

@@ -25,7 +25,7 @@
 
 #include <boost/unordered/unordered_map.hpp>
 #include <boost/function.hpp>
-#include <boost/signals2.hpp>
+#include <boost_signals2.hpp>
 #include <boost/graph/adjacency_list.hpp>
 #include <boost/graph/topological_sort.hpp>
 #include <App/PropertyLinks.h>

src/App/PropertyLinks.h

@@ -25,7 +25,7 @@
 #define APP_PROPERTYLINKS_H
 
 // Std. configurations
-#include <boost/signals2.hpp>
+#include <boost_signals2.hpp>
 
 #include <vector>
 #include <map>

src/App/TextDocument.cpp

@@ -25,7 +25,7 @@
 
 #include <string>
 #include <fstream>
-#include <boost/signals2.hpp>
+#include <boost_signals2.hpp>
 
 #include "DocumentObject.h"
 #include "TextDocument.h"

src/App/TextDocument.h

@@ -26,7 +26,7 @@
 
 
 #include <string>
-#include <boost/signals2.hpp>
+#include <boost_signals2.hpp>
 
 #include "DocumentObject.h"
 #include "PropertyStandard.h"