build: fix FTBFS on GCC 6.2

I'm not surprised that GCC 6 doesn't let me send an ostream ref to itself,
even inside an uninstantiated template specialization.  I am a little
surprised I was trying to, and 4.9 let me get away with it.

It's 2016.  auto_ptr is deprecated now.

Some things were including vector that don't any more.

https://github.com/Zygo/bees/issues/1

include/crucible/cache.h

@@ -8,6 +8,7 @@
 #include <map>
 #include <mutex>
 #include <tuple>
+#include <vector>
 
 namespace crucible {
 	using namespace std;

include/crucible/chatter.h

@@ -86,16 +86,6 @@ namespace crucible {
 		}
 	};
 
-	template <>
-	struct ChatterTraits<ostream &> {
-		Chatter &
-		operator()(Chatter &c, ostream & arg)
-		{
-			c.get_os() << arg;
-			return c;
-		}
-	};
-
 	class ChatterBox {
 		string m_file;
 		int m_line;

lib/chatter.cc

@@ -15,7 +15,7 @@
 namespace crucible {
 	using namespace std;
 
-	static auto_ptr<set<string>> chatter_names;
+	static shared_ptr<set<string>> chatter_names;
 	static const char *SPACETAB = " \t";
 
 	static

src/bees-context.cc

@@ -5,6 +5,7 @@
 
 #include <fstream>
 #include <iostream>
+#include <vector>
 
 using namespace crucible;
 using namespace std;