Create the mount point in the current working directory

If no mount point is provided on the command line, create a mount point
in the current working directory, instead of next to the input archive.
This seems more "natural".

README.md

@@ -22,7 +22,7 @@ on-the-go decompression and caching for maximum efficiency.
 
 **mount-zip** automatically creates the target mount point if it doesn't exist
 yet. If no mount point is provided, **mount-zip** creates a mount point in the
-same directory as the ZIP archive.
+current working directory.
 
 # OPTIONS
 

main.cc

@@ -511,7 +511,7 @@ int main(int argc, char* argv[]) try {
       PLOG(ERROR) << "Cannot create mount point " << Path(param.mount_point);
     }
   } else {
-    param.mount_point = Path(param.filename).WithoutExtension();
+    param.mount_point = Path(param.filename).Split().second.WithoutExtension();
     const auto n = param.mount_point.size();
 
     for (int i = 0;;) {

mount-zip.1

@@ -34,7 +34,7 @@ provides on-the-go decompression and caching for maximum efficiency.
 \f[B]mount-zip\f[R] automatically creates the target mount point if it
 doesn\[cq]t exist yet.
 If no mount point is provided, \f[B]mount-zip\f[R] creates a mount point
-in the same directory as the ZIP archive.
+in the current working directory.
 .SH OPTIONS
 .TP
 \f[B]--help\f[R] or \f[B]-h\f[R]