[FIX #132] fix regex for integer recognition

src/modules/filterProtonData/WProtonData.cpp

@@ -138,7 +138,7 @@ void WProtonData::detectColumnTypesFromCsvData( WDataSetCSV::ContentSPtr csvData
 
 std::string WProtonData::determineColumnTypeByString( std::string cellValue )
 {
-    std::regex regexInt( R"(^-?[[:d:]]+$)" );
+    std::regex regexInt( R"(^[-\+]?[[:d:]]+([eE]\+?0?[1-9])?$)" );
     std::regex regexDouble( R"(^([+-]?(?:[[:d:]]+\.?|[[:d:]]*\.[[:d:]]+))(?:[Ee][+-]?[[:d:]]+)?$)" );
 
     if( std::regex_search( cellValue, regexInt ) )

src/modules/filterProtonData/WSingleSelectorName.cpp

@@ -25,6 +25,7 @@
 #include <list>
 #include <string>
 
+#include "WDatatype.h"
 #include "WSingleSelectorName.h"
 
 std::string WSingleSelectorName::getX()