Added checks to prevent some php errors   * include/gen-lastblock.php exists   * include/announcement.html exists
Added checks to prevent some php errors
  * include/gen-lastblock.php exists
  * include/announcement.html exists

Cooba13/proxypool-simplestats,Cooba13/proxypool-simplestats,Cooba13/proxypool-simplestats,Cooba13/proxypool-simplestats