Merge remote-tracking branch 'origin/release-4.x'

Conflicts:
	.travis.yml
	CMakeLists.txt
	include/chaiscript/dispatchkit/bootstrap.hpp
	include/chaiscript/dispatchkit/boxed_cast.hpp
	include/chaiscript/dispatchkit/dynamic_cast_conversion.hpp
	include/chaiscript/dispatchkit/function_call_detail.hpp
	include/chaiscript/dispatchkit/proxy_functions.hpp
	include/chaiscript/language/chaiscript_common.hpp

include/chaiscript/language/chaiscript_engine.hpp

@@ -742,7 +742,7 @@ namespace chaiscript
         if (t_handler) {
           t_handler->handle(bv, m_engine);
         }
-        throw bv;
+        throw;
       }
     }
 
@@ -768,7 +768,7 @@ namespace chaiscript
         if (t_handler) {
           t_handler->handle(bv, m_engine);
         }
-        throw bv;
+        throw;
       }
     }
 
@@ -798,7 +798,7 @@ namespace chaiscript
         if (t_handler) {
           t_handler->handle(bv, m_engine);
         }
-        throw bv;
+        throw;
       }
     }
 
@@ -814,7 +814,7 @@ namespace chaiscript
         if (t_handler) {
           t_handler->handle(bv, m_engine);
         }
-        throw bv;
+        throw;
       }
     }
 
@@ -834,7 +834,7 @@ namespace chaiscript
         if (t_handler) {
           t_handler->handle(bv, m_engine);
         }
-        throw bv;
+        throw;
       }
     }
   };