Changed installer to build from Ur/Web tip to fix socket errors

toolset/setup/linux/installer.py

@@ -202,11 +202,11 @@ class Installer:
     # Ur/Web
     #
 
-    self.__download("http://www.impredicative.com/ur/urweb-20130421.tgz")
-    self.__run_command("tar xzf urweb-20130421.tgz")
-    self.__run_command("./configure", cwd="urweb-20130421")
-    self.__run_command("make", cwd="urweb-20130421")
-    self.__run_command("sudo make install", cwd="urweb-20130421")
+    self.__run_command("hg clone http://hg.impredicative.com/urweb/")
+    self.__run_command("./autogen.sh", cwd="urweb")
+    self.__run_command("./configure", cwd="urweb")
+    self.__run_command("make", cwd="urweb")
+    self.__run_command("sudo make install", cwd="urweb")
 
     #######################################
     # Webservers